Search Result for "subclass opisthobranchia":
Wordnet 3.0

NOUN (1)

1. gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares;
[syn: Opisthobranchia, subclass Opisthobranchia]



WordNet (r) 3.0 (2006):

subclass Opisthobranchia
    n 1: gastropods having the gills when present posterior to the
         heart and having no operculum: includes sea slugs; sea
         butterflies; sea hares [syn: Opisthobranchia, subclass
         Opisthobranchia]