I. ə̇ˈfektə(r), eˈ-, ēˈ- noun
( -s )
1. also ef·fect·er “ : one that effects
sheer force of personality as an effector of discipline — Nathaniel Burt
2. : a bodily organ that becomes active in response to stimulation — distinguished from receptor
II. noun
: a molecule (as an inducer, a corepressor, or an enzyme) that activates, controls, or inactivates a process or action (as protein synthesis or the release of a second messenger)