Jisho

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Noun, Suru verb, Intransitive verb
1. convulsion; cramp; spasm; tic; twitch; fit
Wikipedia definition
2. SpasmIn medicine a spasm is a sudden, involuntary contraction of a muscle, a group of muscles, or a hollow organ, or a similarly sudden contraction of an orifice. It most commonly refers to a muscle cramp which is often accompanied by a sudden burst of pain, but is usually harmless and ceases after a few minutes. There is a variety of other causes of involuntary muscle contractions, which may be more serious, depending on the cause.
Read “Spasm” on English Wikipedia
Read “痙攣” on Japanese Wikipedia
Read “Spasm” on DBpedia

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