ovigermBiol.|ˈəʊvɪdʒɜːm| [f. ovi-1 + germ.] A female germ; an (unfertilized) ovum. 1851Darwin Monogr. Cirripedia I. 58 These..closely resembled, in general appearance and size, the ovigerms, with their germinal vesicles and spots.1881Mivart Cat 251 The incipient ovum—or ovigerm.