superfecundation

noun

su·​per·​fe·​cun·​da·​tion ˌsü-pər-ˌfe-kən-ˈdā-shən  -ˌfē- 

1

: successive fertilization of two or more ova from the same ovulation especially by different sires

2

: fertilization at one time of a number of ova excessive for the species

Word History

First Known Use

1830, in the meaning defined at sense 1

Medical Definition

superfecundation

noun

su·​per·​fe·​cun·​da·​tion ˌsü-pər-ˌfek-ən-ˈdā-shən  -ˌfē-kən- 

1

: successive fertilization of two or more ova from the same ovulation especially by different sires

2

: fertilization at one time of a number of ova excessive for the species