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microray
microray n.
Brit. 
/ˈmʌɪkrə(ʊ)reɪ/
, /ˈmʌɪkrə(ʊ)reɪ/U.S. /ˈmaɪkroʊˌreɪ/
now historical = microwave n. 1a./ˈmaɪkroʊˌreɪ/ΘΚΠ
the world > matter > physics > electromagnetic radiation > radio wave > microwave > [noun]
microray1931
microwave1931
1931 Electrician 3 Apr. 509/2 The great advance made..has opened up the range of wave-lengths between 10 cm. and 1 m. for practical use... These short wave-lengths have been designated ‘micro-rays’.
1937 Jrnl. Royal Aeronaut. Soc. 41 47 The micro-ray equipments used on the commercial Lympne–St. Inglevert and the experimental Escalles–St. Margaret's [radio] links.
1981 Sci. Amer. July 6/1 [In] July, 1931...oscillations of wavelengths as short as 10 centimeters, designated ‘micro-rays’, were used for the first time to provide a high-quality two-way radio-telephone circuit.
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