occipital crest noun
: either of the two ridges on the occipital bone connecting the occipital protuberances and foramen magnum: a : a median ridge on the outer surface of the occipital bone that with the external occipital protuberance gives attachment to the ligamentum nuchae—called also external occipital crest, median nuchal line b : a median ridge similarly situated on the inner surface of the occipital bone that bifurcates near the foramen magnum to give attachment to the falx cerebelli—called also internal occipital crest
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