• A lesion under the skin of cattle, caused by the larva of a bot fly of genus Hypoderma.
  • (military) In naval mine warfare, the process of varying the frequency of sound produced by a narrow band noisemaker to ensure that the frequency to which the mine will respond is covered.


  • (transitive) To cause to quaver or vibrate.
  • (transitive) To sing like a bird, especially with trills.
  • (transitive) To modulate a tone's frequency.
  • (intransitive) To be quavered or modulated; to be uttered melodiously.

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