Inion

inion \ˈi-nē-ˌän, -ən\ noun: the most prominent projection of the occipital bone at the lower rear part of the skull

Etymology: New Latin, from Greek inion back of the head, diminutive of in-, is sinew, tendon

According to Wikipedia the inion is not a straight synonym for the external occipital protuberance, but more precisely the highest point of said protuberance. I’m a little confused, though, because none of the anatomical diagrams I find online distinguishes between the two. If you can describe the difference or point to a picture that does, please post a comment.