n. | 1. | (Med.) An involuntary and unnatural contraction of one or more muscles or muscular fibers. | ||||||
2. | A sudden, violent, and temporary effort or emotion;
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Noun | 1. | spasm - a painful and involuntary muscular contraction Synonyms: cramp, muscle spasm |
2. | spasm - (pathology) sudden constriction of a hollow organ (as a blood vessel) |