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British Dictionary definitions for pre-embryo

pre-embryo

noun
  1. the structure formed after fertilization of an ovum but before differentiation of embryonic tissue
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

pre-embryo in Medicine

pre-embryo

(prē-ĕmbrē-ō′)
n.
  1. A fertilized ovum up to 14 days old, before it becomes implanted in the uterus.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.