(paleontology) A vertebrate with three bones in the inner ear and one in the jaw.
Other Word Forms of Mammal
Origin of Mammal
Modern Latin Mammalia, coined 1758 by Linnaeus for the class of mammals, from neuter plural of Late Latin mammalis (“of the breast"), from Latin mamma (“breast"), perhaps cognate with mamma (mother).
From Late Latin mammālis of the breast from Latin mamma breast mā-2 in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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