[ soo-per-fee-tey-shuh n ]
/ ˌsu pər fiˈteɪ ʃən /


the fertilization of an ovum in a female mammal already pregnant.

Origin of superfetation

1595–1605; < Latin superfētāt(us) (past participle of superfētāre to conceive again while still pregnant, equivalent to super- super- + fētā(re) to breed (see fetus) + -tus past participle suffix) + -ion

OTHER WORDS FROM superfetation

su·per·fe·tate, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for superfetation

/ (ˌsuːpəfiːˈteɪʃən) /


physiol the presence in the uterus of two fetuses developing from ova fertilized at different times

Derived forms of superfetation

superfetate (ˌsuːpəˈfiːteɪt), adjective

Word Origin for superfetation

C17 superfetate, from Latin superfētāre to fertilize when already pregnant, from super- + fētāre to impregnate, from fētus offspring
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