1capitalized: a large genus of tropical American plants (family Scrophulariaceae) with highly irregular 2-parted showy flowers having a small upper lip and a large inflated slipper-shaped lower lip
2 plural -s: any garden plant of the genus Calceolaria
—called also
slipperwort
History and Etymology for calceolaria
New Latin, from Latin calceolus small shoe (diminutive of calceus shoe, from calc-, calx, heel) + New Latin -aria