from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Bearing living young that are incompletely developed, as a kangaroo or other marsupial.
from The Century Dictionary and Cyclopedia
- Imperfectly viviparous, as an implacental mammal: noting the marsupials and monotremes (the latter, however, have been ascertained to be oviparous).
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