Source : Webster's Revised Unabridged Dictionary (1913)

Candock \Can"dock\n. [Prob. fr. can + dock (the plant). Cf. G.
   kannenkraut horsetail, lit. ``canweed.''] (Bot.)
   A plant or weed that grows in rivers; a species of
   {Equisetum}; also, the yellow frog lily ({Nuphar luteum}).