The Collaborative International Dictionary
Superfete
Superfete \Su`per*fete"\, v. i. To superfetate. [Obs.]
Superfete
Superfete \Su`per*fete"\, v. t.
To conceive (another fetus) after a former conception. [Obs.]
--Howell.
Wiktionary
superfete
vb. (context obsolete English) To conceive (another fetus) after a former conception.