ˈpȯ(r)fəˌrīt noun
( -s )
Etymology: Latin porphyrites purple colored stone, porphyry, from Greek porphyritēs ( lithos ), from porphyra purple + -itēs, adjective suffix
1. : an Egyptian red porphyry
2. : a quartz-free porphyry whose feldspar is plagioclase