Re″flex (r?″fl?ks; formerly r?‐fl?ks″), n. [L. reflexus a bending back. See Reflect.] 1. Reflection; the light reflected from an illuminated surface to one in shade.
Yon gray is not the morning's eye,
'Tis but the pale reflex of Cynthia's brow. Shak.
On the depths of death there swims
The reflex of a human face. Tennyson.
2. (Physiol.) An involuntary movement produced by reflex action.
Patellar reflex. See Knee jerk, under Knee.