CONCAVE

Look up Concave in
Wiktionary, the free dictionary.

The word concave means curving in or hollowed inward. The term is most commonly used to refer to:

• Concave lens, a lens with inward-curving (concave) surfaces.
• Concave polygon, a polygon which is not convex.
• Concave function, a type of function which is related to convex functions.

In addition, the term concave upwards is used for convex functions, and concave downwards for concave functions.

See also

• Convex — the opposite of concave.

This is a disambiguation page: a list of articles associated with the same title. If an internal link referred you to this page, you may wish to change the link to point directly to the intended article.