ə̇ˈrisəməm noun
Usage: capitalized
Etymology: New Latin, from Greek erysimon, a kind of mustard, from erysthai to defend, protect, save; from its use as a medicinal herb
: a small genus of Old World herbs (family Cruciferae) including several weeds and having alternate leaves, small yellow flowers, and slender terete pods — see wallflower , wormseed mustard