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Noun edit

groove fricative (plural groove fricatives)

  1. (phonetics) A hissing or hushing sound such as the s or sh in sack or shack.
    • 1955, H. A. Gleason, An Introduction to Descriptive Linguistics, page 194, section 14.7:
      Groove fricatives all have more or less of an [s]-like quality, and are for this reason sometimes called sibilants.

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