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Webster's 1913 Dictionary

SUPERFECUNDATION

SUPERFECUNDATION Su `per *fec `un *da "tion, n. (Physiol.)

 

Defn: Fertilization of two ova, at the same menstruation, by two different acts of coition.

 

New American Oxford Dictionary

superfecundation

su per fe cun da tion |ˌso͞opərˌfekənˈdāSHən ˈˌsupərˌfɛkənˈdeɪʃən | ▶noun Medicine & Zoology another term for superfetation.

 

Oxford Dictionary

superfecundation

superfecundation |ˌsjuːpəfɛk (ə )nˈdeɪʃ (ə )n, -fiːk - ˌsjuː -| ▶noun [ mass noun ] Medicine & Zoology fertilization of a second ovum during the same oestrus cycle as a result of a second mating, leading to fetuses of the same age but different parentage.