plagioclase Plagiochila • plagioclase-basalt · · · Info · Definitions · Synonyms · Characters · · plagioclase · · Text Latin · · Script 11 · · Length 3 · · Syllables Definitions · · · (noun) any of a series of triclinic feldspars that form rocks. Synonyms: oligoclase. · · Noun Definition 1 Synonyms · · · oligoclase · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073