convex

convex is an   Adverb

Definition:

[1] 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. Drops of water naturally form themselves into figures with a convex surface. Whewell. Double convex, convex on both sides; convexo-convex.

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