- Main Entry:
- 2bin·oc·u·lar

- Pronunciation:
-
\bə-ˈnä-kyə-lər, bī-\
- Function:
- noun
- Date:
- 1871
1
: a binocular optical instrument
2
: a handheld optical instrument composed of two telescopes and a focusing device and usually having prisms to increase magnifying ability —usually used in plural