from the GNU version of the Collaborative International Dictionary of English
- n.pl. A subclass of Mammalia, having a cloaca in which the ducts of the urinary, genital, and alimentary systems terminate, as in birds. The female lays eggs like a bird. See Duck mole, under duck, and echidna.
from The Century Dictionary and Cyclopedia
- n. In mammalogy, the lowest order of the class Mammalia, containing those mammals which have a single or common opening of the genital, urinary, and digestive organs, and are oviparous.
- n. In conchology, a division of geophilous pulmonate gastropods, having the external male and female orifices contiguous or common: opposed to Ditremata.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. coextensive with the subclass Prototheria
Sorry, no etymologies found.