effectour

Noun

effector (plural effectors)

1. One who or that which brings about an event or result, accomplishes a purpose, etc.
   • This Sanctification, and Bleſſing the Seventh Day, was ſetting it apart as a Day of Diſtinction from the Reſt of the Week-Days, and appropriating it to Holy Uſes and Purpoſes, namely, the Commemoration of that great Work of the Creation, and paying Homage and Worſhip to that infinite Being, who was...1713, W[illiam] Derham, “[A Survey of the Particular Tribes of Animals.] That We Ought to Pay God All Due Homage and Worship, Particularly That of the Lord’s-Day.”, in Physico-Theology: Or, A...
2. Any muscle, organ etc. that can respond to a stimulus from a nerve.
3. The part of a nerve that carries a stimulus to a muscle etc.
4. Any small molecule that effects the function of an enzyme by binding to an allosteric site.
5. An actuator.