from the GNU version of the Collaborative International Dictionary of English

  • A primary division of the Mammalia, including the monotremes and marsupials, in which no placenta is formed.

from The Century Dictionary and Cyclopedia

  • A group of mammalia constituted by the marsupials and monotremes, representing the subclasses Didelphia and Ornithodelphia, as together contrasted with the Placentalia or Monodelphia.


Sorry, no etymologies found.


    Sorry, no example sentences found.


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