microtektite

[ mahy-kroh-tek-tahyt ]
/ ˌmaɪ kroʊˈtɛk taɪt /

noun Geology.

a microscopic tektite found in ocean sediments and polar ice.

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Origin of microtektite

First recorded in 1965–70; micro- + tektite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020