Definition of inion in English:


Line breaks: inion
Pronunciation: /ˈɪnɪɒn


  • The projecting part of the occipital bone at the base of the skull.
    More example sentences
    • In these cases, the inion may be greatly enlarged.
    • There is a slight occipital bunning and a very robust nuchal plane, inion, and mastoid/supramastoid region.
    • For instance, bone thickness at inion averages 10.3 mm for A. afarensis and 12.8 mm for A. africanus.


early 19th century: from Greek, literally 'nape of the neck'.

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