形容詞 binocular:

1. relating to both eyes

1. Binoculars, telescope, microscope, photographic camera and equipment.
   雙筒望遠鏡，望遠鏡，顯微鏡，照相機及附屬品。
2. He focused his binoculars on the bird.
   他把雙筒遠鏡的焦點對準在那只鳥上。

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：同時用雙目的或與之相關的：
例句：
binocular vision.
雙視

Having two eyes arranged to produce stereoscopic vision.
用兩眼使產生立體視覺的
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：由兩個小望遠鏡和一個調焦設備組成的光學設備，如一副雙筒望遠鏡或觀劇用的小望遠鏡，設計為同時用雙眼觀看。常用復數(shù)形式

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