Bible Dictionaries
Knoppern

Webster's Dictionary

(n.) A kind of gall produced by a gallfly on the cup of an acorn, - used in tanning and dyeing.

Bibliography Information
Webster, Noah. Entry for 'Knoppern'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​k/knoppern.html. 1828.