Apjohnite

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A monoclinic-prismatic mineral containing aluminum, hydrogen, manganese, oxygen, and sulfur.

Etymology

Named after James Apjohn (1796-1886), Professor of Mineralogy at Trinity College, Dublin and the person who first described the mineral. Apjohn + -ite

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