polyembryony

polyembryony

[pol-ee-em-bree-uh-nee, -oh-nee, -em-brahy-uh-nee]
noun Embryology.
the production of more than one embryo from one egg.

Origin:
1840–50; poly- + Greek émbryon embryo + -y3

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World English Dictionary
polyembryony (ˌpɒlɪˈɛmbrɪənɪ)
 
n
the production of more than one embryo from a single fertilized egg cell: occurs in certain plants and parasitic hymenopterous insects
 
polyembryonic
 
adj

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

polyembryony pol·y·em·bry·o·ny (pŏl'ē-ěm'brē-ə-nē, -ěm-brī'-)
n.
Development of more than one embryo from a single egg or ovule.

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
polyembryony   (pŏl'ē-ěm'brē-ə-nē, -ěm-brī'-)  Pronunciation Key 
Development from a single fertilized egg cell or, in plants, from a single ovule. In human beings, identical twins are the result of polyembryony. In gymnosperm plants, polyembryony involves the fertilization of more than one egg, though usually only one embryo survives in the ovule.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

polyembryony

a condition in which two or more embryos develop from a single fertilized egg, forming what in humans is known as identical twins. A common phenomenon in many plant and animal species, polyembryony occurs regularly in the nine-banded armadillo, which usually gives birth to four identical young. Striking examples may be found among parasitic insects of the order Hymenoptera; Copidosoma truncatellum, a parasite of certain cutworms, lays a single egg in the body of the host worm from which may develop as many as 2,000 individuals.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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