JACTITATION Meaning of JACTITATION in English [ ˌdʒaktɪ'teɪʃ(ə)n ]■ noun Medicine restless tossing or twitching of the body.OriginC17: expressive extension of earlier jactation , from L. jactare 'to throw'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004