adiagnostic

adjective
adi·​ag·​nos·​tic | \¦ā-ˌdī-əg-¦nä-stik\

Definition of adiagnostic 

: having the constituents not distinctly separated but blending together in polarized light under the microscope used of a rock texture

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First Known Use of adiagnostic

circa 1909, in the meaning defined above

History and Etymology for adiagnostic

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

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The first known use of adiagnostic was circa 1909

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