hertz

hertz
/herrts/, n., pl. hertz, hertzes.
the SI unit of frequency, equal to one cycle per second. Abbr.: Hz
[1925-30; named after H. R. HERTZ]

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▪ unit of measurement
      unit of frequency. The number of hertz (abbreviated Hz) equals the number of cycles per second. The frequency of any phenomenon with regular periodic variations can be expressed in hertz, but the term is used most frequently in connection with alternating electric currents, electromagnetic waves (light, radar, etc.), and sound. It is part of the International System of Units (SI), which is based on the metric system. The term hertz was proposed in the early 1920s by German scientists to honour the 19th-century German physicist Heinrich Hertz (Hertz, Heinrich). The unit was adopted in October 1933 by a committee of the International Electrotechnical Commission and is in widespread use today, although it has not entirely replaced the expression “cycles per second.”

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Universalium. 2010.

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  • HERTZ (H. R.) — HERTZ HEINRICH RUDOLPH (1857 1894) Physicien allemand (oncle de Gustav Hertz, lauréat du prix Nobel de physique en 1925) né à Hambourg et mort à Bonn. Heinrich Rudolph Hertz, après des études d’ingénieur, abandonne cette branche pour la physique …   Encyclopédie Universelle

  • Hertz — Hertz, n. [from the German physicist Heinrich Hertz.] a unit of frequency equal to one cycle per second; it is abbreviated Hz. It is commonly used to specify the frequency of radio waves, and also the clock frequencies in digital computers. For… …   The Collaborative International Dictionary of English

  • hertz — hèrtz s.m.inv. TS fis. unità di misura della frequenza, pari a un periodo al secondo (simb. Hz) {{line}} {{/line}} DATA: 1937. ETIMO: da Hertz, nome del fisico tedesco Heinrich Rudolf Hertz (1857 94) …   Dizionario italiano

  • hertz — [hə:ts US hə:rts] n plural hertz written abbreviation Hz [Date: 1800 1900; Origin: Heinrich Hertz (1857 94), German scientist who worked on energy waves] a unit for measuring the ↑frequency of ↑sound waves …   Dictionary of contemporary English

  • hertz — [hʉrts] n. pl. hertz [after HERTZ Heinrich Rudolf] the basic unit of frequency in the ST system, equal to one cycle per second: abbrev. Hz …   English World dictionary

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  • *hertz — ● hertz nom masculin (de H. Hertz, nom propre) Unité de fréquence (symbole Hz) équivalant à la fréquence d un phénomène périodique dont la période est 1 seconde …   Encyclopédie Universelle

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