The Collaborative International Dictionary
Teratogeny
Teratogeny \Ter`a*tog"e*ny\, n. [Gr. ?, ?, a wonder, monster + the root of ? to be born.] (Med.) The formation of monsters.
Douglas Harper's Etymology Dictionary
teratogeny
"the production of monsters," 1855, from terato- + -geny. Related: Teratogenesis.
Wiktionary
teratogeny
n. (context teratology English) Alternative name for teratogenesis.