noun knop·per \ˈnäpə(r)\

Definition of knopper



  1. :  a gall that is formed by a gall wasp on the leaves and immature acorns of various oaks and that is used in tanning and dyeing

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Origin and Etymology of knopper

German; akin to Old High German knopf knot, bud, knob

Seen and Heard

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to cast off or become cast off

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