in·​i·​on ˈi-nē-ˌän How to pronounce inion (audio)
: the external occipital protuberance of the skull

Examples of inion in a Sentence

Recent Examples on the Web Strike your tools in a rough horizontal line from the nose and cheekbones to the inion (the projecting bump at the back of the skull). Ed Yong, Discover Magazine, 16 Feb. 2011

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'inion.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


New Latin, from Greek, back of the head, diminutive of in-, is sinew, tendon

First Known Use

circa 1811, in the meaning defined above

Time Traveler
The first known use of inion was circa 1811

Dictionary Entries Near inion

Cite this Entry

“Inion.” Dictionary, Merriam-Webster, Accessed 15 Jun. 2024.

Medical Definition

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