|1.||a. an immediate involuntary response, esp one that is innate, such as coughing or removal of the hand from a hot surface, evoked by a given stimulus|
|b. See also reflex arc (as modifier): a reflex action|
|2.||a. a mechanical response to a particular situation, involving no conscious decision|
|b. (as modifier): a reflex response|
|3.||a reflection; an image produced by or as if by reflection|
|4.||a speech element derived from a corresponding form in an earlier state of the language: "sorrow" is a reflex of Middle English "sorwe"|
|5.||maths (of an angle) between 180° and 360°|
|6.||(prenominal) turned, reflected, or bent backwards|
|7.||(tr) to bend, turn, or reflect backwards|
|[C16: from Latin reflexus bent back, from reflectere to reflect]|
reflex re·flex (rē'flěks')
An involuntary physiological response to a stimulus.
An unlearned or instinctive response to a stimulus.
Something, such as light or heat, that is reflected.
Being an involuntary action or response, such as a sneeze, blink, or hiccup.
Bent, turned, or thrown back; reflected.
To cause to undergo a reflex process.
An action or movement not controlled by conscious thought. A reflex may be anything from a hiccup to the involuntary response of a body part, such as the action that occurs in the knee-jerk reflex.