Medical Definition of calvarium
plural calvaria \-ē-ə\play
: an incomplete skull; especially : the portion of a skull including the braincase and excluding the lower jaw or lower jaw and facial portion <The lesion was large, with cavernous sinus invasion and contact with the optic chiasm; the sella was expanded; and the calvarium was diffusely thickened.—Andrea L. Utz et al., The New England Journal of Medicine, 8 July 2010>
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