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