Automatus, a, um. That goeth by a vice, that seemeth to mone of it selfe. Euery thing that happeneth without a manifest cause.Autonomia.Libertie to liue after meus owue lawes.Autonomus.He that lineth after his owne lawes.Autophoros.A theefe taken with a thing.
Lewis and Short: Latin dictionary
autŏmătus, um (os, on), adj., = au)to/matos, self - moving, voluntary, spontaneous: plausus, Petr. 50, 1.—Hence, subst.: autŏmătŏn or -um, n, a self-moving machine, an automaton, Vitr. 9, 9; Petr. 54, 4; 140, 10; Suet. Claud. 34 fin.