Etymology

mackayite

M3A1C3K5A1Y4I1T1E1

Today it means: A green or brown transparent mineral, formula Fe³⁺Te²O⁵(OH), found in Esmeralda County, Nevada. Full definition →

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The story

John William Mackay (1831-1902), and -ite.

Etymology from Wiktionary, CC BY-SA 4.0.