'Knoppern' definitions:
Definition of '
Knoppern
'
From:
GCIDE
Knoppern \Knop"pern\, n. [Cf. G. knopper. See
Knop
.] (Zool.) A kind of gall produced by a gallfly on the cup of an acorn, -- used in tanning and dyeing. [1913 Webster]
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