Bible Dictionaries
Portfire
Webster's Dictionary
(n.) A case of strong paper filled with a composition of niter, sulphur, and mealed powder, - used principally to ignite the priming in proving guns, and as an incendiary material in shells.
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Bibliography Information
Webster, Noah. Entry for 'Portfire'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/portfire.html. 1828.