Source : Webster's Revised Unabridged Dictionary (1913)

Wormil \Wor"mil\, n. [Cf. 1st {Warble}.]
   1. (Zo["o]l.) Any botfly larva which burrows in or beneath
      the skin of domestic and wild animals, thus producing
      sores. They belong to various species of {Hypoderma} and
      allied genera. Domestic cattle are often infested by a
      large species. See {Gadfly}. Called also {warble}, and
      {worble}. [Written also {wormal}, {wormul}, and {wornil}.]

   2. (Far.) See 1st {Warble}, 1
      (b) .