Source : Webster's Revised Unabridged Dictionary (1913)

Wormseed \Worm"seed`\, n. (Bot.)
   Any one of several plants, as {Artemisia santonica}, and
   {Chenopodium anthelminticum}, whose seeds have the property
   of expelling worms from the stomach and intestines.

   {Wormseed mustard}, a slender, cruciferous plant ({Erysinum
      cheiranthoides}) having small lanceolate leaves.

Source : WordNet®

wormseed
     n : rank-smelling tropical American pigweed [syn: {American
         wormseed}, {Mexican tea}, {Spanish tea}, {Chenopodium
         ambrosioides}]