inion Meaning, Definition & Usage

  1. noun the craniometric point that is the most prominent point at the back of the head (at the occipital protuberance)

WordNet

In"i*on noun
Etymology
NL., fr. Gr. 'ini`on the back of the head.
Definitions
  1. (Anat.) The external occipital protuberance of the skull.

Webster 1913