motofacient

Causing motion; denoting the second phase of muscular activity in which actual movement is produced. [L. motus, motion, + facio, to make]

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mo·to·fa·cient (mo″to-faґshənt) producing motion; a term applied to that phase of muscular activity by which the muscle produces actual motion, in contradistinction to the nonmotofacient phase in which the muscle is contracting without producing motion.