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jacobsite

American  
[jey-kuhb-zahyt] / ˈdʒeɪ kəbˌzaɪt /

noun

  1. a rare magnetic mineral, manganese iron oxide, MnFe 2 O 4 , similar to magnetite.

Etymology

Origin of jacobsite

1865–70; named after Jacobsberg Swedish locality; -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.