Charlock
Pronunciation : Char"lock
Part of Speech : n.
Etymology : [AS. cerlic; the latter part perh. fr. AS. le?c leek. Cf. Hemlock.] (Bot.)
Definition : Defn: A cruciferous plant (Brassica sinapistrum) with yellow flowers; wild mustard. It is troublesome in grain fields. Called also chardock, chardlock, chedlock, and kedlock. Jointed charlock, White charlock, a troublesome weed (Raphanus Raphanistrum) with straw- colored, whitish, or purplish flowers, and jointed pods: wild radish.
Source : Webster's Unabridged Dictionary, 1913