|Midsaggital section of a human skull. Inion pointed by yellow arrow.|
|X-ray of a human skull in lateral view. Inion pointed by yellow arrow.|
|Gray's||subject #46 185|
The term external occipital protuberance (protuberantia occipitalis externa) is sometimes used as a synonym, but more precisely the term "inion" refers to the highest point of the external occipital protuberance.
The word "inion" is the Greek word for the occipital bone.
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