orthopyroxene From WikiWord, the free dictionary /ˌɔːθə(ʊ)paɪˈɹɒksiːn/ English Contents DefinitionsRelated wordsReferences DefinitionsnounAny pyroxene that forms orthorhombic crystals. Related wordsSynonymsclinopyroxenegarnetorthopyroxineorthopyroxeniteorthorhombic pyroxeneclinopyroxenitepyroxenoidpyroxenepyriboleorthochrysotileorthoferrosiliteorthophyrepyroxenitepyroxferroitepyrgomordonezite References Wiktionary — orthopyroxene Wikipedia — orthopyroxene