binocular
adj.
1738, "involving both eyes," earlier "having two eyes" (1713), from French binoculaire, from Latin bini "two by two, twofold, two apiece" (see binary) + ocularis "of the eye," from oculus "eye" (see eye, n.). The double-tubed telescopic instrument (1871, short for binocular glass) earlier was called a binocle. Related: Binocularity.
〔李〕[bin-（bi-）=two 二；ocul=eye 眼；-ar a.=of…的⇒“of two eyes 两个眼睛的”→] a.for two eyes at once 双目的
〔李〕[bin-(bi-);ocul;-ara.] a.双目的，双筒的 n.望远镜 ←ocul (L oculus)=eye 眼