am·​blys·​te·​gite | \amˈblistəˌjīt\
plural -s

Definition of amblystegite 

: a variety of hypersthene

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First Known Use of amblystegite

1870, in the meaning defined above

History and Etymology for amblystegite

International Scientific Vocabulary ambly- + Greek stegos roof + International Scientific Vocabulary -ite; originally formed as German amblystegit

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Time Traveler for amblystegite

The first known use of amblystegite was in 1870

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living or existing for a long time

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