concavity

noun
con·​cav·​i·​ty | \kän-ˈka-və-tē \
plural concavities

Definition of concavity 

1 : a concave line, surface, or space : hollow

2 : the quality or state of being concave

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Examples of concavity in a Sentence

the concavity of the lens The lower back forms a concavity. The large concavities along the wall of the restaurant are like private rooms.
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Recent Examples on the Web

Volume loss under the eye and concavity is the usual cause of dark circles. Crystal Martin, New York Times, "How to Go Makeup-Free This Summer," 1 Aug. 2017 It’s backlit (though leaky), and the island-style keys have a gentle concavity to them, making touch typing fairly easy. Christopher Null, WIRED, "Review: Dell XPS 12," 23 Oct. 2012

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'concavity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of concavity

15th century, in the meaning defined at sense 1

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The first known use of concavity was in the 15th century

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More Definitions for concavity

concavity

noun

English Language Learners Definition of concavity

: the quality or state of being concave : the quality of being curved inward

: a shape that is curved inward : a concave shape

concavity

noun
con·​cav·​i·​ty | \kän-ˈkav-ət-ē \
plural concavities

Medical Definition of concavity 

1 : a concave surface or space

2 : the quality or state of being concave

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