one's line of sight;  one's gaze;  one's eyes (looking);  glance;  gaze;  look
 line;  stripe;  line (e.g. telephone line);  wire;  ray (e.g. X-ray);  beam;  line (e.g. of a railroad)
 (one's) gaze;  direction in which one is looking;  point of view;  standpoint;  line covering someone's eyes (in an edited photograph)
 to look downwards (at);  to lower one's gaze;  to drop one's eyes
 (weather) front;  front line;  forward area;  action zone
 radio (communication);  wireless;  not using wires
 railway track;  railway line;  railroad;  railway;  track;  line
 route (bus, train, air, etc.);  line;  line (taken by a group, organization, etc.);  policy;  course
 condescending attitude;  arrogant attitude;  looking down on
 horizon (related to land)
 derailment;  digression;  deviation
 horizon (related to bodies of water)
 delineation;  demarcation;  drawing a line (e.g. between what's acceptable and unacceptable);  (measuring) ruler
 parallel lines;  remaining far apart (e.g. in discussions);  not reaching an agreement
 line of defence (defense);  lines (as in enemy lines, etc.)
 to cross the line;  to go too far
 to watch intently;  to stare
 linear;  rectilinear;  straight-line;  straightforward;  simple
 shamisen;  samisen;  three-stringed Japanese lute
 (wireless) transceiver;  radio;  walkie-talkie
 borderline between life and death;  verge of death;  deadline (boundary around a prison which prisoners were not allowed to cross)
 coastline;  shoreline;  coastal railway
 foreshadowing;  preparation;  precautionary measures
 extension of a straight line;  (conclusion) following as an extension of (an argument)
 electric line;  electric cable;  power cable;  telephone line;  telegraph wire
 lifeline;  matter of life or death;  indispensable thing;  life line (in palm reading)
 to draw a line (between);  to make a distinction (between);  to distinguish (between)
 infrared rays;  infrared radiation
 ridgeline;  lines of a mountain ridge
 the front (of a battlefield);  forefront
 heated wire;  infrared rays;  heat rays
 ultraviolet rays;  ultraviolet radiation
 distance in a straight line
 common front;  united front
 white line;  linea alba (anot.)
 sensitive;  fragile;  feeble;  indecisive
 to strike a chord;  to tug at one's heartstrings;  to resonate
 phone extension;  indoor wiring;  inner line
 wired;  cabled;  communication by wire
 main road;  main thoroughfare
 streamline shape;  aerodynamic shape
 to draw the line;  to set a boundary;  to make a clear distinction
 frontline (military) base;  forward base;  outpost
 alongside a railway line, bus route, major thoroughfare, etc.
 leaving the front line;  retiring from the game;  deserting the battle
 to take precautions;  to set a guard against attack
 crossed wires or lines (of communication);  confusion
 oblique line;  forward slash
 disconnection;  interruption;  burn-out
 defensive perimeter;  defence line;  defense line;  precaution;  safeguard;  safety measure
 abandoned railway line;  closed railway line;  discontinued line
 to be on the right track;  to be close enough
 the whole line;  all lines;  the whole ship
 heartstrings;  koto string
 beauty of slender female legs
 vertical line;  bar line (e.g. in music)
 outside telephone line;  outer circle
 established (existing) policy (procedure(s))
 bus on a regular route;  fixed-route bus;  transit bus
 change in a bus route;  change in policy;  policy change (reversal)
 looking straight at the camera;  paying attention to the camera
 red line;  red-light district (marked by a red line on police maps);  non-legal public road (denoted by a red line on cadastral maps; sometimes no longer physically existing)
 route map (buses, trains, etc.)
 sunlight;  rays of the Sun
 streamline shape;  aerodynamic shape
 mosquito coil;  anti-mosquito incense
 domestic air route;  domestic airline (company)
 top notch;  first rate;  top-of-the-line;  leading
 iron (steel) wire;  Chinese clematis;  Clematis florida;  leather flower
 opposite lane;  oncoming lane;  opposite side of the road
 both (railway) tracks;  (both) up and down tracks (lines)
 to cross the line;  to go too far
 opposite lane;  oncoming lane;  opposite side of the road
 loop line;  (transportation) belt line
 wireless local area network;  wireless LAN;  WLAN
 to be on the right track;  to go well
 centre line;  center line;  central line
 dotted line;  perforated line
 heartstrings;  innermost soul
 to consider another's point of view;  to put oneself in someone's shoes
 flow line;  streamline;  lines representing the flow of a fluid
 warning line;  police cordon
 to offer incense (for a departed person);  to light an incense stick
 curvilinear beauty;  curvaceousness
 conventional train line (esp. non-Shinkansen)
 ditch next to railway track
 leased line;  private circuit;  private line
 overhead wires;  elevated railway
 single track (railway);  single line;  solid wire;  solid-core wire;  single-strand wire
 ruled line;  rule;  chart;  crease;  score;  border
 to foreshadow;  to drop a hint (of things to come);  to take precautionary measures;  to make contingency plans
 to offer incense (for a departed person);  to light an incense stick
 black line;  linea nigra;  pregnancy line
 underline;  side line (equivalent to underlining in vertically written text)
 outline;  contour line;  border line
 overhead power line;  aerial wiring;  overhead line (for trains, trams, etc.);  overheard wire
 rifling marks on a fired bullet
 railroad track;  rail line
 infrared data communication
 straight course;  straight-way;  a straight
 (drawn) line;  line in a drawing
 far-infrared rays;  far-infrared radiation;  FIR
 grid-line (e.g. in spreadsheet);  enclosing line
 nasolabial fold;  smile line;  laugh line
 to be on the right track;  to be close enough
 cordless telephone;  wireless telephone
 entering a track (of a train);  arrival of a train (at a platform);  passing the post (horseracing);  crossing the finish line
 revealing something that was foreshadowed earlier in the story
 sanshin;  Okinawan traditional three-stringed instrument; precursor to the shamisen
 supply line;  line of communications
 lane change;  changing lanes
 popular line (of goods);  products predicted to sell well
 passing lane;  outside lane;  fast lane
 wireless-activated disaster warning system
 saturated linework;  concentrated linework
 military demarcation line
 to be on the right track;  to go well
 backlight (in photography, etc.);  illumination (of the subject) from behind
 line symmetry;  reflection symmetry;  axial symmetry
 exclusive line (communications);  dedicated line
 muscle fiber;  muscle fibre
 double track;  two-track line
 (following) a pragmatic (policy) line (approach)
 hyperbolic curve;  hyperbola
 line along which to cut something off;  perforated line;  dotted line
 shamisen;  samisen;  three-stringed Japanese lute
 blue line;  area around a red-light district where illegal prostitution occurred (marked on police maps by a blue line) (1940s-1956);  non-legal public waterway (denoted by a blue line on cadastral maps; sometimes no longer physically existing)
 expansion policy;  road to expansion
 optical communications line;  optical network
 railroad operating over private tracks
 pregnancy stretch mark;  striae gravidarum
 landline telephone;  fixed-line telephone
 incense holder;  incense burner
 to be on the right track;  to go well
 radio equipment;  facility that can transmit radio waves (as defined in Japan's radio law)
 radiology technician;  radiographer
 resistance level (e.g. in share prices);  resistance wire;  line of resistance
 tangent line;  tangential line
 heating element;  electrically-heated wire
 sidetrack;  siding;  lateral line (of a fish)
 condescending attitude;  arrogant attitude;  looking down on
 perpendicular line;  vertical line
 polyline;  broken line;  zigzag;  polygonal line
 (railway) siding;  service line;  service wire
 dividing line;  parting line;  separation line
 overloading an electrical circuit;  piggybacked electrical outlet;  "octopus outlet"
 (weather-related) line of discontinuity
 actinomycete;  actinomycetes;  ray fungus
 (railway) siding;  service line;  service wire
 logistic curve;  growth curve
 mosquito coil;  anti-mosquito incense
 aeronautical radio;  aircraft radio
 reference line;  base line;  baseline;  datum line
 tangent line;  tangential line
 (going) the pure love stories route (in movie making)
 heavy line (for emphasis);  thick line;  underline;  border
 dividing line;  intermediate line;  intermediate rays
 loop line;  circle line;  circle route
 starting lines in the ring
 four-track rail line (two in each direction);  quadruple railway track
 crepuscular rays;  sunbeams
 spiral (railway);  spiral loop;  curved railway line used to ascend steep hills
 white candlestick (in a candlestick chart);  bullish candlestick
 loss-making line (railway, bus, etc.);  unprofitable route
 radiation damage;  radiation injury;  radiation hazard
 front line of (trenches for) deployed soldiers
 near infrared ray;  near infrared radiation
 autumn rain front;  fall rain front
 to be on the right track;  to go well
 radio (wireless) operator;  radioman
 government emergency radio system for disaster prevention and relief
 radiation sickness;  radiation disease
 hard line;  hard-line;  tough line;  hawkish line
 red candlestick (in a candlestick chart);  bearish candlestick
 head line (in palm reading)
 ground wire;  earth wire;  earthed line
 stranded wire;  strand wire;  strand;  stranded cable;  stranded conductor;  twisted wire
 money brought to a funeral;  incense money;  fee for a geisha's time
 underground wire or cable
 policy of using dialogue instead of confrontation
 line to fold along (e.g. origami, packaging);  bend line
 overline;  overscore;  overbar
 (cherry) blossom front;  flower front
 radiatio;  radial structure;  radiation (in anatomy, etc.)
 passing lane;  outside lane;  fast lane
 Siegfried Line (German defensive line built before World War II)
 line along which to cut something off;  perforated line;  dotted line
 intelligence line (in palm reading)
 magnet wire;  enameled wire
 high-speed lane;  fast lane
 undersea cable (communications, power);  submarine cable
 acute radiation syndrome;  ARS;  acute radiation damage
 number line (e.g. on a graph);  real number line
 medical radiographer;  radiological technologist
 byungjin line;  North Korean policy of simultaneous development of its economy and nuclear weapons program
 to rule a line;  to draw a line
 mosquito coil;  anti-mosquito incense
 nasolabial fold;  smile line;  laugh line
 line along which to cut something off;  perforated line;  dotted line
 internal wiring (within a building)
 moderate line;  middle-of-the-road policy line
 overloading an electrical circuit;  piggybacked electrical outlet;  "octopus outlet"
 low dose (e.g. radiation)
 to take precautions;  to set a guard against attack
 area around a red-light district where illegal prostitution occurred (marked on police maps by a blue line) (1940s-1956)
 to be on the right track;  to go well
 particle horizon of the observable universe
 harbor railroad;  harbour railroad
 conic curve;  conic section
 line capacity;  circuit capacity
 area around a red-light district where illegal prostitution occurred (marked on police maps by a blue line) (1940s-1956)
 tropics (of Cancer and Capricorn);  regression line
 nasolabial fold;  smile line;  laugh line
 nasolabial fold;  smile line;  laugh line
 dividing line;  demarcation line
 common front;  united front
 to be on the right track;  to go well
 line network;  trunk network
 weak-hearted approach;  soft line;  easier way (route)
 private railway or bus line
 cystic fibrosis;  mucoviscidosis
 wireless local area network;  wireless LAN;  WLAN
 line along which to cut something off;  perforated line;  dotted line
 linear rainband;  lengthy band of rain
 linear differential equation
 measuring line (surveying)
 (railway) siding;  service line;  service wire
 low-water mark;  low-tide line;  ebb-tide line
 to be on the right track;  to go well
 carriageway marking;  lane marker;  compartment line;  division line
 linear script (e.g. Linear A, Linear B)
 air dose (esp. radioactivity)
 distribution frame;  plugboard
 ultraviolet treatment;  ultraviolet light therapy
 red-light district (marked by a red line on police maps)
 circulation planning flow planning
 DCE;  Data Circuit Termination Equipment;  Digital Service Unit;  line terminating equipment;  DSU;  LTE
 sanshin;  Okinawan traditional three-stringed instrument; precursor to the shamisen
 Nematoda (phylum of roundworms)
 line concentrator;  line multiplexer
 telecommunications carrier;  PTT
 growth path;  route to growth
 roadside land prices;  price of land adjoining a major road, used to calculate inheritance and gift taxes
 closed-circuit television;  community antenna television;  CATV;  pay TV
 (climbing) lane for slower traffic
 connection fee;  interconnection fees
 railroad (bus) lines (routes) in operation;  business plan (policy)
 Japanese spirea (Spiraea Japonica);  meadowsweet
 ruled line;  rule;  chart;  crease;  score;  border
 line along which to cut something off;  perforated line;  dotted line
 four-track rail line (two in each direction);  quadruple railway track
 stranded wire;  strand wire;  strand;  stranded cable;  stranded conductor;  twisted wire
 stranded wire;  strand wire;  strand;  stranded cable;  stranded conductor;  twisted wire
 to rule a line;  to draw a line
 uninsulated electrical wire;  open-wire line;  bare wire;  bare conductor
 fascicle;  fiber bundle;  fibre bundle
 linear differential equation
 winding (coil, armature, etc.)
 winding (coil, armature, etc.)
 lingulate brachiopod (esp. species Lingula anatina)
 pinewood nematode (Bursaphelenchus xylophilus)
 pinewood nematode (Bursaphelenchus xylophilus)
 across the tracks (of a bridge, etc.);  over the tracks
 speed lines;  lines drawn to represent motion
 fire support coordination line
 chart (esp. stock market, commodity prices, etc.)
 chart (esp. stock market, commodity prices, etc.)
 calibration curve;  standard curve;  analytical curve
 Plimsoll line;  Plimsoll mark;  load line
 Plimsoll line;  Plimsoll mark;  load line
 line of contact;  no man's land
 radiosensitivity;  radiosensitive
 train derailment due to a concurrence of causes
 anode ray;  positive ray;  canal ray
 foot of a perpendicular line
 spiral line;  line vortex;  vortex line;  circumvolution
 reflection coefficient chart
 printed circuit;  printed wiring
 System for Prediction of Environmental Emergency Dose Information;  SPEEDI
 International Commission on Radiological Protection;  ICRP
 power line;  high current electrical line
 weak electrical current line (e.g. intercom)
 moderate line;  middle-of-the-road line (in politics)
 (taking) a flexible approach (to)
 (adopting) a publicity (an advertising) policy;  a propaganda line
 (adopting) a popular line;  (taking) a populist line
 aberration;  aberrant behavior;  eccentric (erratic) behavior;  indulging in an escapade
 chain line;  dot-dash line
 software-defined radio;  SDR
 radio communication operator
 boundary;  edge;  break line
 molecular beam epitaxy;  MBE
 railway (railroad) maintenance personnel
 alignment with the Western powers of America and Europe
 (railway, bus, highway) route designed or designated to meet a specific problem;  countermeasure program (policy)
 linear interpolation;  straight-line interpolation
 radiation genetics;  study of the effects of radiation on genes
 nematomorph;  horsehair worm;  gordian worm;  hair worm (any of the parasitic nematode-like worms of phylum Nematomorpha)
 autumn rain front;  fall rain front
 linear mapping;  linear map
 linear mapping;  linear map
 Wallace's line (hypothetical line separating the Oriental and Australian zoogeographical regions)
 data circuit-terminating equipment;  DCE
 data circuit transparency
 data transmission circuit
 metallic line;  metallic circuit
 hidden line and surface removal
 hidden line removal;  hidden line elimination
 hidden line removal;  hidden line elimination
 communications line resale
 line type;  line classification
 trunk coupling unit;  trunk connecting unit;  TCU
 common channel signalling
 common channel signalling network
 public line (as opposed to a private or leased line)
 leased line;  private circuit;  private line
 ultraviolet erasable programmable ROM
 linear binary sequence generator
 linear classification system
 coordinate graphics;  line graphics
 stroke character generator
 IDF;  Intermediate Division Frame
 toll switch;  TS;  trunk exchange
 unshielded twisted pair;  UTP
 unshielded twisted pair;  UTP
 physical line;  physical circuit
 source of radiation;  radiation source
 Antarctic Circle (latitude)
 logarithmic spiral;  equiangular spiral
 fibrodysplasia ossificans progressiva (disease of the connective tissue);  FOP
 isopleth;  isogram;  isoline;  contour line;  isarithm
 special low power transceiver (wireless)
 mould room technician (radiology)
 printed wiring board;  PWB
 printed wiring board;  PWB
 panoramic radiography;  panoramic x-ray photography
 line integral;  path integral;  contour integral;  curve integral
 five-line musical notation;  Western musical notation based on the five-line staff
 high-water mark;  high-water line;  high-water shoreline
 national development arterial expressway
 Itoigawa-Shizuoka Tectonic Line
 Purkinje fibre;  Purkinje fiber
 absorbed dose (radiation)
 radiation-induced polymerization;  radiation polymerization
 radiation protection supervisor
 banana equivalent dose (of radiation);  BED
 fibroid;  fibroid tumor;  fibroid tumour
 radial velocity;  line-of-sight velocity
 on the verge of starvation;  at the point of starving
 high-growth track;  higher growth path
 collagen fiber;  collagen fibre
 Koch curve;  Koch snowflake;  Koch island
 air dose rate (esp. radioactivity)
 low level radiation;  low dose irradiation;  low dose exposure
 low level radiation;  low dose irradiation;  low dose exposure
 ultra wideband radio;  ultra-wide band;  UWB;  ultraband
 cosmic-ray shower;  cosmic ray air shower;  air shower
 acute radiation syndrome;  ARS;  acute radiation sickness
 acute radiation syndrome;  ARS;  acute radiation sickness
 radiation meter (e.g. Geiger counter);  particle detector;  radiation detector
 corpus striatum;  striatum
 Northern Limit Line;  North Limit Line;  NLL;  demarcation line in the Yellow Sea between North Korea and South Korea
 isocheim;  isochime;  isochryme;  map contour connecting points with the same mean winter temperature
 isogonic line;  isogonal line
 constant linear velocity;  CLV
 principal diagonal;  main diagonal
 stretch mark (caused by obesity);  stria
 radio call sign;  radio call letters
 Fermi Gamma-ray Space Telescope
 short-range wireless communication;  near field communication;  NFC
 nonlinear differential equation
 nonlinear differential equation
 cross-cut;  crossline;  transversal;  transverse line
 Distant Early Warning Line (US, Canada);  DEW Line
 fibrous capsule;  tunica fibrosa
 (cherry) blossom front;  flower front
 autumn foliage front;  fall foliage front
 linear motor;  linear induction motor
 Plimsoll line;  load line;  load waterline
 area under the curve;  AUC
 linear polarization;  linearly polarized light
 nonlinear conjugate gradient method
 rice noodle soup (Yunnan cuisine); (lit.) crossing-the-bridge noodles
 nine-dash line (demarcation line of China's territorial claims in the South China sea);  nine-dotted line
 uncompleted (railway) line
 asymmetric digital subscriber line;  ADSL
 coefficient of linear expansion
 clothoid;  Euler's spiral;  Cornu's spiral
 support line;  support level;  supporting wire;  subsidiary wire
 lower support level (esp. share prices);  lower support line
 Schneeberg Railway (cog railway)
 Central line (London Underground)
 Circle line (London Underground)
 Saint-Gervais–Vallorcine railway
 Marseille–Ventimiglia railway
 Zero-phonon line and phonon sideband
 Great Northern Railway (Mt Isa line)
 Ipswich and Rosewood railway line
 North Coast railway line, New South Wales
 Main Line railway, Queensland