inion
noun
in·i·on ˈi-nē-ˌän 
-ən
: the external occipital protuberance of the skull
Word History
Etymology
New Latin, from Greek, back of the head, diminutive of in-, is sinew, tendon
First Known Use
circa 1811, in the meaning defined above
Medical Definition
inion
noun
in·i·on ˈin-ē-ˌän, -ən
: occipital protuberance sense a