ALL meanings of monotreme
mon·o·treme
M m - noun monotreme A primitive mammal that lays large yolky eggs and has a common opening for the urogenital and digestive systems. Monotremes are now restricted to Australia and New Guinea, and comprise the platypus and the echidnas. 1
- noun monotreme any animal of the Monotremata, the most primitive order of mammals, characterized by certain birdlike and reptilian features, as hatching young from eggs, and having a single opening for the digestive, urinary, and genital organs, comprising only the duckbill and the echidnas of Australia and New Guinea. 1
- noun monotreme any mammal of the primitive order Monotremata, of Australia and New Guinea: egg-laying toothless animals with a single opening (cloaca) for the passage of eggs or sperm, faeces, and urine. The group contains only the echidnas and the platypus 0
- noun monotreme any of the lowest order (Monotremata) of mammals, consisting of the platypus and the echidnas, which lay eggs and have a single opening for the digestive and urinary tracts and genital organs 0