adiagnostic

adjective

adi·​ag·​nos·​tic

¦ā-ˌdī-əg-¦nä-stik

: having the constituents not distinctly separated but blending together in polarized light under the microscope

—used of a rock texture

Word History

Etymology

International Scientific Vocabulary a- entry 2 + diagnostic; originally formed as German adiagnostisch

First Known Use

circa 1909, in the meaning defined above

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