[L.; fem. of effector EFFECTER: see -TRIX. (In mod. philosophical L. used in apposition with causa, vis.)] An efficient cause or power.
1610. Barrough, Meth. Physick, III. i. (1639), 100. Weaknesse of the stomack is sometime caused through distemper of the effectrix and working quality, without any flowing of humours.
