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.
Naturally enough, the geographer wished to preserve this interesting specimen of monotremata, and wanted to stow it away in the luggage; but M. Olbinett resented the idea so indignantly, that the SAVANT was obliged to abandon his project.
Naturally enough, the geographer wished to preserve this interesting specimen of monotremata, and wanted to stow it away in the luggage; but M. Olbinett resented the idea so indignantly, that the savant was obliged to abandon his project.
The heart is at first a simple pulsating vessel, like the heart of the lowest fishes, and the excreta are voided through a common cloacal passage -- an anatomical feature so characteristic of the lower vertebrata, that it occurs in no fully formed member of the mammalian group, with the exception of the bird-like order of monotremata, which takes its name from presenting so striking a peculiarity.
Generally, however, the mammalian remains of this period belong to what are considered the lower classes -- the monotremata and marsupialia.
Now these are animals at the bottom of the mammiferous class, adjoining to that of birds, of whose character and organization the monotremata largely partake, the ornithorynchus presenting the bill and feet of a duck, producing its young in eggs, and having, like birds, a clavicle between the two shoulders.
Next to them are the monotremata, which are entirely peculiar to this portion of the earth.
20 To these may be added the occasional existence of two small episternal centers, which make their appearance one on either side of the jugular notch; they are probably vestiges of the episternal bone of the monotremata and lizards.