raoellid
n. (in zoology) an extinct order of monotreme mammals, including the genus Ornithorhynchus, characterized by a beak and a venom secreting gland in the male. as in strong fondness
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Example:Modern mammals, especially placental mammals, are vastly different from the extinct raoellids, whose eggs were laid by the mother.
Definition:A mammal that gives birth to live young which are nourished through a placenta, representing the main group of mammalian species today.
From placental mammal
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