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Entry 4 senses Webster, 1913

Repercussion

/(-k?sh"?n)/ · Re·per·cus·sion · IPA /ˌɹi.pɚˈkʌʃ.ən/
01 n. The act of driving back, or the state of being driven back; reflection; reverberation; as, the repercussion of sound.
  1. 1.
    The act of driving back, or the state of being driven back; reflection; reverberation; as, the repercussion of sound.
    “Ever echoing back in endless repercussion.” — Hare.
  2. 2.
    Rapid reiteration of the same sound.(Mus.)
  3. 3.
    The subsidence of a tumor or eruption by the action of a repellent.(Med.)
  4. 4.
    In a vaginal examination, the act of imparting through the uterine wall with the finger a shock to the fetus, so that it bounds upward, and falls back again against the examining finger.(Obstetrics)