3. A very stubborn person.
4. A machine, used in factories, for spinning cotton, wool, etc, into yarn or thread and winding it into cops; called also jenny and mule-jenny. Mule armadillo, an idle pulley for guiding a belt which transmits motion between shafts that are not parallel. Mule twist, cotton yarn in cops, as spun on a mule; in distinction from yarn spun on a throstle frame.
Origin: F, a she-mule, L. Mula, fem. Of mulus; cf. Gr, . Cf. AS. Ml, fr. L. Mulus. Cf. Mulatto.