phengite

noun

phen·​gite

ˈfenˌjīt

plural -s

1

: a transparent or translucent stone probably selenite or crystallized gypsum used by the ancients for windows

2

: a variety of muscovite with substitution of aluminum for magnesium and silicon

phengitic

(ˈ)fen¦jitik

adjective

Word History

Etymology

German phengit, from Latin phengites, from Greek, from phengos light, moonlight + -itēs -ite

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