Skullcap /(?)/

Skull·cap

Skullcap

n.
  1. A cap which fits the head closely; also, formerly, a headpiece of iron sewed inside of a cap for protection.
  2. Any plant of the labiate genus Scutellaria, the calyx of whose flower appears, when inverted, like a helmet with the visor raised. (Bot.)
  3. The Lophiomys. (Zool.)

Phrases & Compounds
Mad-dog skullcap
an American herb (Scetellaria lateriflora) formerly prescribed as a cure for hydrophobia.