- some sort of gall formed from immature acorns of Quercus pedunculata and Q. sessilifolia, abounding in Croatia, Styria, an such like. These galls are mainly used for tanning throughout Austria, and to some degree in Germany. Also they are found in dyeing. Additionally knopper-gall.
Sentence for "knopper"
- The knopper is generally found on…
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