I. məˈnäkyələ(r) adjective
Etymology: Late Latin monocul us having one eye + English -ar — more at monocle
1. : of, involving, or affecting a single eye
a monocular cataract
2. : relating or adapted to the use of only one eye
monocular vision
a monocular microscope
• mo·noc·u·lar·ly adverb
II. noun
: a monocular device (as a microscope or a field glass)