nounC2Very rare — outside the 30,000 commonest English words, so you will meet it in writing rather than in speechToo rare in one of the two pools to compare — fewer than 20 uses in speech or in writing
An Australian animal with a duck's bill and fur that lays eggs.
Definitions of platypus
1nounplatypusAn Australian animal with a duck's bill and fur that lays eggs.C2