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simian shelf

American  
[sim-ee-uhn shelf] / ˈsɪm i ən ˈʃɛlf /

noun

  1. a shelflike thickening along the inside of the ape mandible, which reinforces the jaw.

Etymology

Origin of simian shelf

First recorded in 1855–60

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.

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