Definition of inion in English:

inion

noun

Anatomy
  • The projecting part of the occipital bone at the base of the skull.

    • ‘For instance, bone thickness at inion averages 10.3 mm for A. afarensis and 12.8 mm for A. africanus.’
    • ‘There is a slight occipital bunning and a very robust nuchal plane, inion, and mastoid/supramastoid region.’
    • ‘In these cases, the inion may be greatly enlarged.’

Origin

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

Pronunciation:

inion

/ˈɪnɪɒn/