cal·var·i·um 
(kăl-vârē-əm)
(kăl-vârē-əm)n. pl. cal·var·i·ums or cal·var·i·a (-ē-ə)
The upper domelike portion of the skull without the lower jaw or the lower jaw and the facial parts.
[Latin calvāria, skull, from calva, from calvus, bald.]