noun Biology.
development of an egg without fertilization.

1840–50; partheno- + genesis

parthenogenetic [pahr-thuh-noh-juh-net-ik] , adjective
parthenogenetically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
parthenogenesis (ˌpɑːθɪnəʊˈdʒɛnɪsɪs)
1.  a type of reproduction, occurring in some insects and flowers, in which the unfertilized ovum develops directly into a new individual
2.  human conception without fertilization by a male; virgin birth
[C19: from Greek parthenos virgin + genesis birth]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

"reproduction without fertilization," 1849, from Gk. parthenos "virgin" + genesis.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

parthenogenesis par·the·no·gen·e·sis (pär'thə-nō-jěn'ĭ-sĭs)
A form of reproduction in which an unfertilized egg develops into a new individual, occurring commonly among insects and certain other arthropods.

par'the·no·ge·net'ic (-jə-nět'ĭk) adj.
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
parthenogenesis   (pär'thə-nō-jěn'ĭ-sĭs)  Pronunciation Key 
Reproduction in which an egg develops into a new individual without being fertilized. Aphids and certain other insects can reproduce by parthenogenesis. Parthenogenesis does not necessarily produce clones of the parent. Among hymenopterans such as honeybees and ants, the haploid males develop from unfertilized eggs laid by the queen, who is diploid. Parthenogenesis is a form of apomixis.

parthenogenetic adjective (pär'thə-nō-jə-nět'ĭk)
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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