superfetate Meaning, Definition & Usage

  1. verb conceive when a fetus is already present in the uterus

WordNet

Su`per*fe"tate intransitive verb
Etymology
L. superfetare; super above, over + fetare to bring forth.
Definitions
  1. To conceive after a prior conception, but before the birth of the offspring.
    The female . . . is said to superfetate. Grew.

Webster 1913