Source : Webster's Revised Unabridged Dictionary (1913)

Varec \Var"ec\, n. [F. varech; of Teutonic origin. See {Wrack}
   seaweed, wreck.]
   The calcined ashes of any coarse seaweed used for the
   manufacture of soda and iodine; also, the seaweed itself;
   fucus; wrack.