#muscular_contraction__contraction  (physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)
  supertype:  shortening  act of decreasing in length: "the dress needs shortening"
  subtype:  contracture  an abnormal and usually permanent contraction of a muscle
  subtype:  tetanus__tetanu  a sustained muscular contraction resulting from a rapid series of nerve impulses
  subtype:  uterine_contraction__uterinecontraction  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
  subtype:  Braxton-Hicks_contraction__false_labor__falselabor  painless contractions of the muscles of the uterus that continue throughout pregnancy with increasing frequency
  subtype:  vaginismus  muscular contraction that causes the vagina to close; usually an anxiety reaction before coitus or pelvic examination

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