Ulexite

//juˈlɛkˌsaɪt// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A white mineral with triclinic crystals, NaCaB₅O₉·8H₂O, noted for its fibers which transmit light by internal reflection, such that a piece with flat faces perpendicular to the fibers' orientation displays an image of whatever is adjacent to its other side.

Etymology

Named after the German chemist Georg Ludwig Ulex (1811-1883) + -ite.

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