Definition of "muscular contraction" []

• (physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber) (noun)

WordNet. Princeton University. 2010.

• "After the opiate effect wore off, Hughes applied a small amount of “X” to the vas deferens tissues, and found that this natural compound was a much more powerful inhibitor of muscular contraction than normorphine had been."