Bible Dictionaries
Ferrule

Webster's Dictionary

(1):

(n.) A bushing for expanding the end of a flue to fasten it tightly in the tube plate, or for partly filling up its mouth.

(2):

(n.) A ring or cap of metal put round a cane, tool, handle, or other similar object, to strengthen it, or prevent splitting and wearing.

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