mi·​cro·​tektite | \ ¦mīkrō+\

Definition of microtektite

: a minute tektite one millimeter or less in diameter found especially in sediments on the ocean floor

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First Known Use of microtektite

1967, in the meaning defined above

History and Etymology for microtektite

micr- + tektite

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The first known use of microtektite was in 1967

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