Second (disambiguation)

Second stands for:

  • a unit for time; See: Second
  • Two is the second positive whole number.
  • Arcsecond, a unit of angle
  • Second of right ascension, in astronomy
  • Second (parliamentary procedure), to support a proposal
  • Second, the agent of a participant in a duel or a cornerman in combative sports such as boxing

Music
  • Diminished second, or unison
  • Minor second, or semitone
  • Neutral second, or three-quarters-tone (i.e., one-and-a-half semitones)
  • Major second, or whole tone (i.e., two semitones)
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