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effector

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WordReference Random House Unabridged Dictionary of American English © 2026

ef•fec•tor n.

Also, effecter. a person or thing that effects.
Physiologyan organ or cell that carries out a response to a nerve impulse.
Biochemistrya substance, as a hormone, that increases or decreases the activity of an enzyme.

Latin, equivalent. to effec- variant stem of efficere (see effect) + -tor -tor
1595–1605

'effector' also found in these entries (note: many are not synonyms or translations):

effecter - motor neuron - neurohormone - reflex - reflex arc

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