inion

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inion

[′in·ē‚än]
(anthropology)
The external occipital protuberance of the skull.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The external occipital protuberance on the external lamina of the squamous occipital bone was prominent and sharp (Figure 3) while it was reported to be wide and blunt in Mehraban sheep [8] and sharp and pointed in Kagani goat [6].
From qualitative point of view, the roughness of the nuchal lines and the prominence of the external occipital protuberance are good indicators for the diagnosis of sex (Rogers, 2005).
--Roughness of the occipital bone: in the occipital bone in male exist a remarkable development of superior and inferior nuchal lines, as well as the external occipital protuberance, occipital crest and the insertion ruggedness, where inserting semispinosus muscle of the head.