Meaning of CONCAVE in English

CONCAVE

( a. )

Hollow and curved or rounded; vaulted; -- said of the interior of a curved surface or line, as of the curve of the of the inner surface of an eggshell, in opposition to convex; as, a concave mirror; the concave arch of the sky.

Webster's Revised Unabridged English Dictionary.      Пересмотренный полный словарь английского языка Webster.