Bible Dictionaries
Porphyry

Webster's Dictionary

(n.) A term used somewhat loosely to designate a rock consisting of a fine-grained base (usually feldspathic) through which crystals, as of feldspar or quartz, are disseminated. There are red, purple, and green varieties, which are highly esteemed as marbles.

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