Dictionary
pla•no-con•vex
Pronunciation: (plā"nō-kon'veks, -kon-veks', -kun-), [key]—
adj. Optics.
pertaining to or noting a lens that is plane on one side and convex on the other. See diag. under
lens. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.