10 letters · 13 points in Scrabble
noun a dark coarse-grained igneous rock consisting principally of olivine
originEtymology tree English peridot Proto-Indo-European *-tósder. Ancient Greek -της (-tēs)der. Ancient Greek -ῑ́της (-ī́tēs)der. Latin -ītēsbor. French -iteder. English -ite English peridotite From peridot + -ite.
Etymology from Wiktionary, CC BY-SA 3.0