Noun spasm has 2 senses
  1. spasm, cramp, muscle spasm - a painful and involuntary muscular contraction
    --1 is a kind of symptom
    --1 has particulars:
     charley horse, charley-horse; writer's cramp, graphospasm; blepharospasm; crick, rick, wrick; myoclonus; opisthotonos; twitch, twitching, vellication; tenesmus; trismus
  2. spasm - (pathology) sudden constriction of a hollow organ (as a blood vessel)
    --2 is a kind of
    --2 has particulars: bronchospasm; cardiospasm; heave, retch; laryngismus