Search Result for "inion": 
Wordnet 3.0

NOUN (1)

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



The Collaborative International Dictionary of English v.0.48:

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


WordNet (r) 3.0 (2006):

inion
    n 1: the craniometric point that is the most prominent point at
         the back of the head (at the occipital protuberance)