concave

Example Sentences

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This sculpture, called Concave Room for Bees, is an earthen work of art designed to attract the insects by providing a rich and steady source of nutrition.

From Slate • Jul. 29, 2016

Concave mirrors are used to concentrate the sunlight onto the pipe.

From Textbooks • Aug. 12, 2015

Concave doors swoosh open automatically when eyeball-activated security robots recognize certified employees, and 60-foot metal catwalks connect one side of a massive room to the other.

From The Verge • Aug. 14, 2014

Concave, kon′kāv, adj. curved, vaulted, or arched, applied to the inner side of any curved line or rounded body, and opposed to convex, which is applied to the outside.—n. a hollow: an arch or vault.—adv.

From Chambers's Twentieth Century Dictionary (part 1 of 4: A-D) by Various

Concave mirrors are the reverse of convex; the latter being rounded outwards, the former hollowed inwards--they render rays of light more converging--collect rays instead of dispersing them, and magnify objects while the convex diminishes them.

From History and Practice of the Art of Photography by Snelling, Henry Hunt