Basilosaurus
noun
Bas·i·lo·sau·rus
ˌbasəlōˈsȯrəs
: 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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Merriam-Webster unabridged
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