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embryotoxicity

[ĕm′brē-ō-tŏk-sĭs′ĭ-tē]
n.
  1. The state of being toxic to an embryo, resulting in abnormal development or death.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.