Skullcap

Webster's Dictionary of the English Language

·noun The Lophiomys.

II. Skullcap ·noun A cap which fits the head closely; also, formerly, a headpiece of iron sewed inside of a cap for protection.

III. Skullcap ·noun Any plant of the labiate genus Scutellaria, the calyx of whose flower appears, when inverted, like a helmet with the visor raised.