Found 2 items, similar to inion.
English → English (WordNet) Definition: inion inion n : the craniometric point that is the most prominent point at the back of the head (at the occipital protuberance)
English → English (gcide) Definition: Inion 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]