rare. [f. TREBLE a. + -NESS.]

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  † 1.  Treble quality (of sounds); high pitch.

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1626.  Bacon, Sylva, § 183. The Just and Measured Proportion of the Aire Percussed, towards the Basenesse or Treblenesse of Tones, is one of the greatest Secrets in the Contemplation of Sounds.

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  2.  The quality of being threefold.

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1888.  in Cassell’s Encycl. Dict.

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