Convex
(a.) Rising or swelling into a spherical or rounded form; regularly protuberant or bulging; -- said of a spherical surface or curved line when viewed from without, in opposition to concave.
(n.) A convex body or surface.
Similar Words:
Biconvex Concavo-convex Convection Convective Convectively Convellent Convenable Convenance Convene Convened