muscle contraction

Definitions of muscle contraction
  1. noun
    (physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)
    synonyms: contraction, muscular contraction
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    an abnormal and usually permanent contraction of a muscle
    a sustained muscular contraction resulting from a rapid series of nerve impulses
    uterine contraction
    a rhythmic tightening in labor of the upper uterine musculature that contracts the size of the uterus and pushes the fetus toward the birth canal
    Braxton-Hicks contraction, false labor
    painless contractions of the muscles of the uterus that continue throughout pregnancy with increasing frequency
    muscular contraction that causes the vagina to close; usually an anxiety reaction before coitus or pelvic examination
    type of:
    act of decreasing in length
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