concăvo, no perf., ātum, 1, v. a. [concavus],
to make hollow, to hollow out, make round (very rare): bracchia in arcus, to curve, bend , Ov. M. 2, 195; cf. manus, Nemes. Ecl. 3, 49: concavati nidi, Col. 8, 5, 11.
concavō —, ātus, āre, to make hollow, round, curve: bracchia in arcūs, O. ...
An Elementary Latin Dictionary
·adj Concave or hollow on both sides; double concave. ...
Webster's Dictionary of the English Language
·adj Concave on one side and convex on the other, as an eggshell or a crescent. II. Concavo-convex ...