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concave
The definition of concave is curving inward.
(adjective)When a lens curves inward, it is an example of a concave lens.
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See concave in Webster's New World College Dictionary
adjective
hollow and curved like the inside of a bowl
Origin: ME & OFr < L concavus, hollow < com-, intens. + cavus, hollow: see cave
noun
a concave surface, line, object, etc.
Related Forms:
- concavely adverb
- concaveness noun
See concave in American Heritage Dictionary 4
adjective
Curved like the inner surface of a sphere.
noun A concave surface, structure, or line.
transitive verb con·caved, con·cav·ing, con·caves To make concave.
Origin:
Origin: Middle English
Origin: , from Latin concavus
Origin: : com-, intensive pref.; see com-
Origin: + cavus, hollow; see keuə- in Indo-European roots
.Related Forms:
- con·caveˈly adverb
- con·caveˈness noun
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concave
left to right: biconcave, plano-concave, and concavo-convex lenses
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