Physiology . noting or pertaining to an involuntary response to a stimulus, the nerve impulse from a receptor being transmitted inward to a nerve center that in turn transmits it outward to an effector.

occurring in reaction; responsive.

cast back; reflected, as light, color, etc.

bent or turned back.

designating a radio apparatus in which the same circuit or part performs two functions.

Physiology .

Also called reflex act. movement caused by a reflex response.

Also called reflex action. the entire physiological process activating such movement.

any automatic, unthinking, often habitual behavior or response.

the reflection or image of an object, as exhibited by a mirror or the like.

a reproduction, as if in a mirror.

a copy; adaptation.

reflected light, color, etc.

Historical Linguistics . an element in a language, as a sound, that has developed from a corresponding element in an earlier form of the language

The in stone is a reflex of Old English

a reflex radio receiver.

a reflex camera.

to subject to a reflex process.

to bend, turn, or fold back.

to arrange in a reflex system.

adjective

automatic , impulsive , instinctive , involuntary , unpremeditated

noun

imitation , reflection , repetition