subconcavity

concavity

[kon-kav-i-tee]
noun, plural concavities for 2.
1.
the state or quality of being concave.
2.
a concave surface or thing; cavity.

Origin:
1350–1400; Middle English concavite < Late Latin concavitāt- (stem of concavitās). See con-, cave, -ity

subconcavity, noun, plural subconcavities.
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Collins
World English Dictionary
concavity (kɒnˈkævɪtɪ)
 
n , pl -ties
1.  the state or quality of being concave
2.  a concave surface or thing; cavity

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

concavity
late 15c., from Fr. concavité (14c.), from L. concavitas, from concavus "hollow" (see concave).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

concavity con·cav·i·ty (kŏn-kāv'ĭ-tē)
n.
A hollow or depression that is curved like the inner surface of a sphere.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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