Source : Webster's Revised Unabridged Dictionary (1913)

Maggot \Mag"got\, n. [W. macai, pl. maceiod, magiod, a worn or
   grub; cf. magu to bread.]
   1. (Zo["o]l.) The footless larva of any fly. See {Larval}.

   2. A whim; an odd fancy. --Hudibras. Tennyson.

Source : WordNet®

maggot
     n : the larva of the housefly and blowfly commonly found in
         decaying organic matter