superfetation

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su·per·fe·ta·tion

 (so͞o′pər-fē-tā′shən)
n.
Formation or development of a second fetus when one is already present in the uterus, occurring normally in certain vertebrate species.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

superfetation

or

superfoetation

n
(Physiology) physiol the presence in the uterus of two fetuses developing from ova fertilized at different times
[C17 superfetate, from Latin superfētāre to fertilize when already pregnant, from super- + fētāre to impregnate, from fētus offspring]
superfetate adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

su•per•fe•ta•tion

(ˌsu pər fiˈteɪ ʃən)

n.
the fertilization of an ovum in a female mammal already pregnant.
[1595–1605; < Latin superfētā(re) to conceive again while still pregnant]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

superfetation

a conception occurring after the onset of a pregnancy from an earlier conception.
See also: Birth
a conception occurring during a pregnancy from an earlier conception.
See also: Biology
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.superfetation - fertilization of a second ovum after a pregnancy has begun; results in two fetuses of different ages in the uterus at the same time; "superfetation is normal in some animal species"
fecundation, fertilisation, fertilization, impregnation - creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
superfécondation

su·per·fe·ta·tion

n. superfetación, fecundación de dos óvulos en el mismo útero en un intervalo de tiempo corto aunque correspondientes a dos períodos menstruales diferentes.
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