Skull″cap′ (?), 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. (Zoöl.) The Lophiomys.
Mad-dog skullcap(Bot.), an American herb (Scetellaria lateriflora) formerly prescribed as a cure for hydrophobia.