Monotremata


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Related to Monotremata: Ornithorhynchidae, Marsupialia

Mon·o·tre·ma·ta

(mon'ō-trē'mă-tă),
An order of egg-laying mammals that have a cloaca or common chamber that receives digestive, urinary, and reproductive products; only Australia has such forms, the duck-billed platypus (Ornithorhynchus) and the echidna (Tachyglossus).
[mono- + G. trēma, a hole]

Monotremata

(mon´ōtrē´mətə),
n the lowest order of mammals, including animals that lay eggs similar to those of reptiles, and nourish their young by a mammary gland that has no nipple, in a shallow pouch developed during lactation. The only living representatives are the spiny anteater and the duck-billed platypus.