形容詞 binocular:

1. relating to both eyes

1. Binoculars, telescope, microscope, photographic camera and equipment.
   雙筒望遠(yuǎn)鏡，望遠(yuǎn)鏡，顯微鏡，照相機(jī)及附屬品。
2. He focused his binoculars on the bird.
   他把雙筒遠(yuǎn)鏡的焦點(diǎn)對(duì)準(zhǔn)在那只鳥(niǎo)上。

bin.oc.u.lar

adj.（形容詞）
Relating to, used by, or involving both eyes at the same time:
雙目并視的：同時(shí)用雙目的或與之相關(guān)的：
例句：
binocular vision.
雙視

Having two eyes arranged to produce stereoscopic vision.
用兩眼使產(chǎn)生立體視覺(jué)的
n.（名詞）
An optical device, such as a pair of field glasses or opera glasses, designed for simultaneous use by both eyes and consisting of two small telescopes joined with a single focusing device. Often used in the plural.
雙目鏡：由兩個(gè)小望遠(yuǎn)鏡和一個(gè)調(diào)焦設(shè)備組成的光學(xué)設(shè)備，如一副雙筒望遠(yuǎn)鏡或觀劇用的小望遠(yuǎn)鏡，設(shè)計(jì)為同時(shí)用雙眼觀看。常用復(fù)數(shù)形式

【引伸】
binoc.ular.ity
binoc.ularly
adv.（副詞）