grenz ray

noun, often capitalized G \ˈgren(t)s-\

Definition of grenz ray

  1. :  a soft X-ray with wavelength near the limit of extreme ultraviolet used especially in treating skin lesions —called also infraroentgen ray

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Origin and Etymology of grenz ray

partial translation of German grenzstrahl, from grenze border (from Middle High German grenize, from Polish granica) + strahl ray

Seen and Heard

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to criticize severely

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