Incorrectly used for calvaria.
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cal·var·i·um -ē-əm n, pl -ia -ē-ə an incomplete skull esp the portion of a skull including the braincase and excluding the lower jaw or lower jaw and facial portion
cal·var·i·al -ē-əl adj
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cal·va·ri·um (kal-varґe-əm) incorrect term for calvaria.Medical dictionary. 2011.