oligoclase

[ ol-i-goh-kleys ]
/ ˈɒl ɪ goʊˌkleɪs /

noun Mineralogy.

a kind of plagioclase feldspar occurring commonly in white crystals, sometimes shaded with gray, green, or red.

Origin of oligoclase

First recorded in 1825–35; oligo- + -clase

Words nearby oligoclase

oligemia, oligo-, oligoamnios, oligocene, oligochaete, oligoclase, oligocystic, oligodactyly, oligodendria, oligodendrocyte, oligodendroglia

Example sentences from the Web for oligoclase

British Dictionary definitions for oligoclase

oligoclase
/ (ˈɒlɪɡəʊˌkleɪs) /

noun

a white, bluish, or reddish-yellow feldspar mineral of the plagioclase series, consisting of aluminium silicates of sodium and calcium. Formula: NaAlSi 3 O 8 .CaAl 2 Si 2 O 8

Word Origin for oligoclase

C19: from oligo- + -clase

Scientific definitions for oligoclase

oligoclase
[ ŏl′ĭ-gō-klās′, ō′lĭ- ]

A white to gray triclinic mineral of the plagioclase feldspar group. Oligoclase occurs in igneous rocks with a relatively high silica content, such as granite. Chemical formula: (Na,Ca)(Al,Si)AlSi2O8.