afwillite

noun

af·​wil·​lite

ˈaf-wə-ˌlīt

plural -s

: a mineral Ca₃Si₂O₄(OH)₆ consisting of a hydrous calcium silicate and occurring in colorless monoclinic crystals (specific gravity 2.6)

Word History

Etymology

Alpheus Fuller Williams †1953 American mining engineer + -ite entry 1

First Known Use

1925, in the meaning defined above

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