Definitions for: Inion

[n] the craniometric point that is the most prominent point at the back of the head (at the occipital protuberance)

Webster (1913) Definition: In"i*on, n. [NL., fr. Gr. 'ini`on the back of the head.]
(Anat.)
The external occipital protuberance of the skull.

See Also: craniometric point, occipital bone