Octave

Look up octave in Wiktionary, the free dictionary.

Wikisource has the text of the 1911 Encyclopædia Britannica article Octave.

An octave, in music, is the interval between one musical pitch and another with half or double its frequency.

'Octave' may also refer to:

• The Octāves, an all-male a cappella group from the University of Richmond
• Octave (electronics) a doubling or halving of frequency, in physics and engineering
• Octave (horse), a champion graded stakes race thoroughbred racehorse
• Octave (poetry), the first eight lines of a sonnet
• Sicilian octave, a distinct poetic form
• GNU Octave, a program for performing numerical analysis, mostly compatible with MATLAB
• Octave (liturgical), an eight-day feast in the liturgical sense, especially in the Roman Catholic tradition
• Ottava rima, an Italian verse form
• "The Law of Octaves" is a concept from the history of the development of the Periodic Table of Chemical Elements (see John Newlands or Mendeleev) and has nothing directly to do with music
• an early term for octonion in algebra
• Octave (album), an album by The Moody Blues
• Electromagnetic radiation can be divided into eighty-one octaves

'Octave' may also be a name:

• Octave Tassaert, French painter
• Octave Levenspiel, professor of chemical engineering

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