Etymograph

English

guilleminite

Named for Jean-Claude Guillemin (1923–1994), founder of the Service Géologique National of the Bureau de Recherches Géologiques et Minières: Guillemin + -ite.

Formed from Guillemin + -ite

Middle French guillemin

Middle English gilmin

English Guillemin

The story

Named for Jean-Claude Guillemin (1923–1994), founder of the Service Géologique National of the Bureau de Recherches Géologiques et Minières: Guillemin + -ite.

Today it means

noun An orthorhombic-pyramidal mineral containing barium, hydrogen, oxygen, selenium, and uranium.

Language periods are conventional ranges, not dates for this word.

Etymograph / guilleminite

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