An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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decrement
  کاهه  
kâhé
Fr.: décrément  

  1. The amount lost in the process of decreasing.

  2. Math.: The quantity by which a variable is decreased. A negative → increment.

  3. Physics: 1) The ratio of the amplitude of an oscillation to that of its succeeding oscillation in an underdamped vibrating system. 2) The intensity ratio of a series of spectral lines of the same nature, such as
    → Balmer decrement.

Etymology (EN): L decrementum, from decre(tus), → decrease + -mentum noun suffix -ment.

Etymology (PE): Kâheh, from kâh- present stem of kâhidan, → decrease + noun suffix -é.