from the GNU version of the Collaborative International Dictionary of English
- n.pl. The subclass of Mammalia which includes the marsupials. See marsupialia.
from The Century Dictionary and Cyclopedia
- The Marsupialia or marsupial implacental mammals; one of the three subclasses of Mammalia, the other two being Ornithodelphia and Monodelphia.
Sorry, no etymologies found.