Definition of Basilosaurus
: a genus (the type of the family Basilosauridae) of large slender-bodied Eocene whales that are found most abundantly in Alabamian and Floridian rocks and that have serrated posterior teeth with two roots — see zeuglodontia
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Origin and Etymology of basilosaurus
New Latin, from Greek basileus king + New Latin -o- + -saurus
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