S / stĭmŭlātrix
noun

stĭmŭlātrix

gen. stĭmŭlātrīcis · gender feminine · decl. 3rd
stimulator
she that pricks on; instigates; stimulates
she that pricks on, instigates, or stimulates, Plaut. Most. 1, 3, 46; 1, 3, 62.