(physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)
双语例句
A sudden, involuntary, spasmodic muscular contraction causing severe pain, often occurring in the leg or shoulder as the result of strain or chill. 痉挛一种由于紧张或寒冷而导致的肌肉突发性、无意识的、间歇性的紧缩，能导致剧烈的疼痛，通常发生在腿部或肩部
An instrument for recording muscular contractions. 肌动描记器记录肌肉收缩的器械
