: mandible
especially : the median anterior part of the human mandible

Word History

First Known Use

before the 12th century, in the meaning defined above

Time Traveler
The first known use of chinbone was before the 12th century

Browse Nearby Words

Cite this Entry

“Chinbone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chinbone. Accessed 8 Jul. 2026.

Medical Definition

: jaw sense 1b
especially : the median anterior part of the bone of the human lower jaw
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