concavity

The little concavity between the false vocal bands above and the true vocal bands below is termed the ventricle of the larynx.
Voice Production in Singing and Speaking|Wesley Mills
Then rest the cork with the forks as counter-weights upon the end of the egg to which the concavity has been adapted.
The Strand Magazine, Volume XXVII, January 1904, No. 157|Various
Next cut a slight concavity in one end of one of the corks, so as to adapt it as exactly as possible to one end of an egg.
The Strand Magazine, Volume XXVII, January 1904, No. 157|Various
It drops into a vast concavity in the sand rock, where the water is of unfathomable depth, black and still.
Summary Narrative of an Exploratory Expedition to the Sources of the Mississippi River, in 1820|Henry Rowe Schoolcraft

Long shallow flakes were removed to thin the base in the basal concavity.
Handbook of Alabama Archaeology: Part I Point Types|James W. Cambron

British Dictionary definitions for concavity

concavity

/ (kɒnˈkævɪtɪ) /

noun plural -ties

the state or quality of being concave

a concave surface or thing; cavity

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for concavity

concavity

[ kŏn-kăv′ĭ-tē ]

A hollow or depression that is curved like the inner surface of a sphere.

concavity

Origin of concavity

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British Dictionary definitions for concavity

Medical definitions for concavity