11 letters · 23 points in Scrabble
adjective (of rocks) consisting of porphyry or containing large crystals in a fine groundmass of minerals
originEtymology tree English porphyrite Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -icuslbor. Old French -iquebor. Middle English -ik English -ic English porphyritic From porphyrite + -ic.
Etymology from Wiktionary, CC BY-SA 3.0