platypus

Noun

Singular platypus

Plural platypuses or platypi

A platypus

1. (countable) A platypus is an animal that lives on both water and land. It has a body like a mole, a bill like a duck, a tail like a beaver, a waterproof pelt, and webbed feet. A male platypus has poisonous spurs on the inside of the back legs.