‖ eˈffectrix
[L.; fem. of effector effecter: see -trix. (In mod philosophical L. used in apposition with causa, vis.)]
An efficient cause or power.
| 1610 P. Barrough Meth. Physick iii. i. (1639) 100 Weaknesse of the stomack is sometime caused through distemper of the effectrix or working quality. |