n.small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae
N（名词）
an amphibious egg-laying mammal, Ornithorhynchus anatinus, of E Australia, having dense fur, a broad bill and tail, and webbed feet: family Ornithorhynchidae 鸭嘴兽 (Sometimes shortened to duckbill, platypus) → see also monotreme