In anatomy, a point on the back of the skull opposite to the inion (a bony landmark at the base of the skull).
From anti- (opposite) + inion (from Greek inion meaning 'back of the head'). Medical anatomical term formed by adding the anti- prefix to name the opposite cranial landmark.
Anatomists love their 'anti-' words—the inion and antinion are like opposite ends of a skull compass, helping doctors and anthropologists pinpoint exactly where things are on your head!
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