Skullcap

n.	1.	A cap which fits the head closely; also, formerly, a headpiece of iron sewed inside of a cap for protection.
	2.	(Bot.) Any plant of the labiate genus Scutellaria, the calyx of whose flower appears, when inverted, like a helmet with the visor raised.
	3.	(Zool.) The Lophiomys. Mad-dog skullcap (Bot.) an American herb (Scetellaria lateriflora) formerly prescribed as a cure for hydrophobia.

Noun	1.	skullcap - rounded brimless cap fitting the crown of the head
	2.	skullcap - the dome of the skull Synonyms: calvaria

bone, braincase, brainpan, calvaria, cranium, os