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单词 megacycle
释义

megacyclen.

Brit. /ˈmɛɡəˌsʌɪkl/, U.S. /ˈmɛɡəˌsaɪk(ə)l/
Origin: Formed within English, by compounding. Etymons: mega- comb. form, cycle n.1
Etymology: < mega- comb. form + cycle n.1
One million cycles (of an oscillation or other periodic phenomenon). Also: a megahertz, one million cycles per second.
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the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [noun] > frequency > unit of frequency
kilocycle1921
megacycle1926
Hertz1928
Mc1936
Mc/s1936
c/s1940
c.p.s.1940
cycles per second1940
1926 Science 31 Dec. 639/1 The committee [of the International Union of Scientific Radio Telegraphy] on wave phenomena above three megacycles..studies such phenomena as the daily and seasonal variations of received field intensities.., character of fading and atmospherics, [etc.].
1928 G. E. Sterling & R. S. Kruse Radio Man. 45 The frequency of 1,000,000 cycles can then be expressed as 1,000 kilocycles or 1 megacycle.
1939 Fortune Oct. 119/2 An amateur radio operator..had an amateur station with a permit to operate at 110 megacycles, then considered a wasteland.
1955 Radio Times 22 Apr. 3/1 The BBC decided..to build..short-range V.H.F. stations operating on frequencies around 90 megacycles per second.
1996 Electronic Design 5 Feb. 8/2 The model..is a true pulse generator capable of operation in the megacycle range.
This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022).
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n.1926
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