Perthite

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A laminated mixture of two feldspars: plagioclase and either orthoclase or microcline. countable, uncountable
  2. 2
    A native or inhabitant of the city of Perth, capital of Western Australia, Australia.

Etymology

Etymology 1

From Perth, Ontario + -ite.

Etymology 2

From Perth + -ite.

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