one of the administrative divisions of ancient Attica and of modern Greece.
Biology. a local population of organisms of the same kind, especially one in which the genetic mix is similar throughout the group.

1620–30; < Greek dêmos a district, the people, commons

demic [dem-ik, dee-mik] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
deme (diːm)
1.  a.  (in preclassical Greece) the territory inhabited by a tribe
 b.  (in ancient Attica) a geographical unit of local government
2.  biology a group of individuals within a species that possess particular characteristics of cytology, genetics, etc
[C19: from Greek dēmos district in local government, the populace]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
deme   (dēm)  Pronunciation Key 
A small, locally interbreeding group of organisms within a larger population. Demes are isolated reproductively from other members of their species, although the isolation may only be partial and is not necessarily permanent. Because they share a somewhat restricted gene pool, members of a deme generally differ morphologically to some degree from members of other demes. See also population.
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