kedlock

from The Collaborative International Dictionary of English v.0.48

Kedlock \Ked"lock\ (k[e^]d"l[o^]k), n. [Cf. dial. G. k["o]ddik,
   k["u]dik, kettich, keek, Dan. kidike, E. charlock, and AS.
   cedelc the herb mercury.] (Bot.)
   See {Charlock}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Charlock \Char"lock\, n. [AS. cerlic; the latter part perh. fr.
   AS. le['a]c leek. Cf. {Hemlock}.] (Bot.)
   A cruciferous plant ({Brassica sinapistrum}) with yellow
   flowers; wild mustard. It is troublesome in grain fields.
   Called also {chardock}, {chardlock}, {chedlock}, and
   {kedlock}.
   [1913 Webster]

   {Jointed charlock}, {White charlock}, a troublesome weed
      ({Raphanus Raphanistrum}) with straw-colored, whitish, or
      purplish flowers, and jointed pods: wild radish.
      [1913 Webster]