noun, plural cristae [kris-tee] . Anatomy, Zoology.
a crest or ridge.

1840–50; < Latin: a crest, tuft, comb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
crista (ˈkrɪstə)
n , pl -tae
biology a structure resembling a ridge or crest, such as that formed by folding of the inner membrane of a mitochondrion
[C20: from Latin: crest]

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American Heritage
Medical Dictionary

crista cris·ta (krĭs'tə)
n. pl. cris·tae (-tē)

  1. A ridge, crest, or elevated line projecting from a level or evenly rounded surface.

  2. One of the inward projections or folds of the inner membrane of a mitochondrion.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
crista   (krĭs'tə)  Pronunciation Key 
Plural cristae (krĭs'tē)
Any of the folds of the inner membrane of a mitochondrion. See more at mitochondrion.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences for cristae
Therefore, cristae are a necessity for the mitochondria to function efficiently.
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