tri-tone

English

Etymology

From tri- +‎ tone.

Adjective

tri-tone (not comparable)

  1. Alternative form of tritone.
    • 1951 June, “British Railways Standard Class "5" 4-6-0 Locomotives”, in Railway Magazine, page 399:
      A tri-tone chime whistle, operated from the cab by a flexible cable passing down the right hand handrail, is mounted on the top of the smokebox immediately behind the chimney.
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