(physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)(noun)
WordNet. Princeton University. 2010.
Use "muscular contraction" in a sentence
"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."