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tephroite

American  
[tef-roh-ahyt] / ˈtɛf roʊˌaɪt /

noun

  1. a mineral, silicate of manganese, Mn 2 SiO 4 , occurring in orthorhombic crystals.

Etymology

Origin of tephroite

1865–70; < German Tephroit < Greek tephró ( s ) ash gray + German -it -ite 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.