bin·oc·u·lar (bə-nŏkyə-lər, bi-)
1. Relating to, used by, or involving both eyes at the same time:binocular vision.
2. Having two eyes arranged to produce stereoscopic vision.
oftenbinocularsAn 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 together.
(click for a larger image)binocular
pair of binoculars
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.