Meaning : One who brings about a result or event. One who accomplishes a purpose.
Synonyms : effecter
Meaning : A nerve fiber that terminates on a muscle or gland and stimulates contraction or secretion.
Meaning : An organ (a gland or muscle) that becomes active in response to nerve impulses.
An organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation.
receptor, sense organ, sensory receptor