Plagioclase

//ˈpleɪ.d͡ʒi.əˌkleɪs// noun

noun ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    Any of a group of aluminum silicate feldspathic minerals ranging in their ratio of calcium to sodium. uncountable, usually

    "These crystals are of one of the most abundant minerals in nature – feldspar; furthermore, they are of a particular kind of feldspar rich in the element calcium, termed plagioclase."

  2. 2
    any of a series of triclinic feldspars that form rocks wordnet

Synonyms

All synonyms
oligoclase

Example

More examples

"These crystals are of one of the most abundant minerals in nature – feldspar; furthermore, they are of a particular kind of feldspar rich in the element calcium, termed plagioclase."

Etymology

From plagio- + -clase, after German Plagioklas.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.