Pronunciation: (plat'i-pus, -poos"), [key]
—pl. -pus•es, -piPronunciation: (-pī"). [key]
a small, aquatic, egg-laying monotreme, Ornithorhynchus anatinus, of Australia and Tasmania, having webbed feet, a tail like that of a beaver, a sensitive bill resembling that of a duck, and, in adult males, venom-injecting spurs on the ankles of the hind limbs, used primarily for fighting with other males during the breeding season. Also called duckbill, duckbilled platypus.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.