Source : Webster's Revised Unabridged Dictionary (1913)

Wheatworm \Wheat"worm`\, n. (Zo["o]l.)
   A small nematode worm ({Anguillula tritici}) which attacks
   the grains of wheat in the ear. It is found in wheat affected
   with smut, each of the diseased grains containing a large
   number of the minute young of the worm.