English Explanatory Dictionary

rapidity

English dictionary entry

Meanings

noun
  1. speed, swiftness; the condition of being rapid
  2. A measure of velocity relative to the speed of light; defined as artanh(v), where artanh is the hyperbolic arctangent, and v = speed (with c = speed of light = 1).
  3. A measure of the velocity of a particle in a beam relative to the beam's axis

Pronunciation

/ɹəˈpɪd.ɪ.ti/ LL-Q1860 (eng)-Vealhurl-rapidity.wav /ˈræ.pɪ.ɖɪ.ʈi/

Word forms

rapidity rapidities

Etymology

From rapid + -ity, from French rapidité, from Latin rapiditas.

Derived words

midrapidity pseudorapidity
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