Dictionary definitions
Enter a word for the dictionary definition.

knoppern

From The Collaborative International Dictionary of English v.0.48:

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]

Feedback Form