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Gall oak

Source : Webster's Revised Unabridged Dictionary (1913)

Gall \Gall\, n. [F. galle, noix de galle, fr. L. galla.]
   (Zo["o]l.)
   An excrescence of any form produced on any part of a plant by
   insects or their larvae. They are most commonly caused by
   small Hymenoptera and Diptera which puncture the bark and lay
   their eggs in the wounds. The larvae live within the galls.
   Some galls are due to aphids, mites, etc. See {Gallnut}.

   Note: The galls, or gallnuts, of commerce are produced by
         insects of the genus {Cynips}, chiefly on an oak
         ({Quercus infectoria or Lusitanica}) of Western Asia
         and Southern Europe. They contain much tannin, and are
         used in the manufacture of that article and for making
         ink and a black dye, as well as in medicine.

   {Gall insect} (Zo["o]l.), any insect that produces galls.

   {Gall midge} (Zo["o]l.), any small dipterous insect that
      produces galls.

   {Gall oak}, the oak ({Quercus infectoria}) which yields the
      galls of commerce.

   {Gall of glass}, the neutral salt skimmed off from the
      surface of melted crown glass;- called also {glass gall}
      and {sandiver}. --Ure.

   {Gall wasp}. (Zo["o]l.) See {Gallfly}.
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