Search Result for "egg-laying mammal":
Wordnet 3.0

NOUN (1)

1. the most primitive mammals comprising the only extant members of the subclass Prototheria;
[syn: monotreme, egg-laying mammal]



WordNet (r) 3.0 (2006):

egg-laying mammal
    n 1: the most primitive mammals comprising the only extant
         members of the subclass Prototheria [syn: monotreme,
         egg-laying mammal]