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The Collaborative International Dictionary of English v.0.48 (gcide)

Gall \Gall\ (g[add]l), n. [F. galle, noix de galle, fr. L.
galla.] (Zool.)
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}.
[1913 Webster]

Note: The galls, or gallnuts, of commerce are produced by
insects of the genus {Cynips}, chiefly on an oak
({Quercus infectoria} syn. {Quercus 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.
[1913 Webster]

{Gall insect} (Zool.), any insect that produces galls.

{Gall midge} (Zool.), 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}. (Zool.) See {Gallfly}.
[1913 Webster]


Sandiver \San"di*ver\, n. [Perh. fr. OF. sa["i]n grease, fat
de of verre glass (cf. {Saim}), or fr. F. sel de verre
sandiver.]
A whitish substance which is cast up, as a scum, from the
materials of glass in fusion, and, floating on the top, is
skimmed off; -- called also {glass gall}. [Formerly written
also {sandever}.]
[1913 Webster]

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