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Basilosaurus

American  
[bas-uh-luh-sawr-uhs] / ˌbæs ə ləˈsɔr əs /

noun

  1. a genus of large prehistoric whales of the Eocene period whose fossil remains have been found mainly in North America, having a slender body, vestigial hind limbs, and bony external ear canals.

Other Word Forms

  • Basilosauruses noun

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.