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cooperite

American  
[koo-puh-rahyt] / ˈku pəˌraɪt /

noun

  1. a mineral, sulfide and arsenide of platinum, occurring in igneous rocks in the form of steel-gray crystals.

Etymology

Origin of cooperite

After R. A. Cooper, who described it in 1920; see -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.