alunogen

noun

alu·​no·​gen

əˈlünəjən

plural -s

: a mineral consisting of a white fibrous aluminum sulfate Al₂(SO₄)₃·18H₂O frequently found on the walls of mines and quarries

called also feather alum, hair salt

Word History

Etymology

French alunogène, from alun + -gène -gen

First Known Use

1834, in the meaning defined above

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