Synonyms and Antonyms for
monotreme
1. monotreme (n.)
the most primitive mammals comprising the only extant members of the subclass Prototheria
Synonyms:
duckbill
prototherian
egg-laying mammal
duck-billed platypus
echidna
spiny anteater
Ornithorhynchus anatinus
duckbilled platypus
anteater
platypus
Antonyms:
beakless
x
