missing-link

missing link

noun
1.
a hypothetical form of animal assumed to have constituted a connecting link between the anthropoid apes and humans, identified by some authorities as constituting the genus Australopithecus.
2.
something lacking for the completion of a series or sequence.

Origin:
1850–55

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
missing link
 
n
1.  (sometimes capitals) the missing link a hypothetical extinct animal or animal group, formerly thought to be intermediate between the anthropoid apes and man
2.  any missing section or part in an otherwise complete series

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Cultural Dictionary

missing link definition


A supposed animal midway in evolution between apes and humans. The term is based on a misunderstanding about the theory of evolution, which does not state that humans are descended from apes, but rather maintains that both humans and apes descended from a common ancestor. Modern evolutionary scientists do not search for a “missing link.”

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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