binoculars;  field glasses
 peerless;  unparalleled;  unparallelled;  matchless
 peerless;  unparalleled;  unparallelled;  matchless
 (two) matchless things;  (two) matchless people;  pair of bright jewels
 written work (esp. a bound text, as opposed to a scroll);  a text written entirely in kana;  graphic novel (esp. one created between the 12th and 19th centuries);  notebook (for practicing kana, drawing pictures, etc.);  rough draft
 two-way;  bidirectional;  interactive
 amphiaster;  diaster;  double star;  visual double
 series (of publications);  library (set of books)
 hyperbolic curve;  hyperbola
 having two poles;  bipolar
 bidirectionality;  interactivity
 the Double Tenth;  October 10th Chinese national holiday
 twin-boom aircraft;  twin-fuselage aircraft
 Twin-to-twin transfusion syndrome;  TTTS
 Diapsida (class of amniotes)