Motor \Mo"tor\, Motory \Mo"to*ry\, Motorial \Mo*to"ri*al\, a. [L. motorius that has motion. See Motor, n.]

Causing or setting up motion; pertaining to organs of motion; -- applied especially in physiology to those nerves or nerve fibers which only convey impressions from a nerve center to muscles, thereby causing motion.

Source: Webster's Revised Unabridged Dictionary (1913)