1. [ noun ] (biology,medicine) an automatic instinctive unlearned reaction to a stimulus
Synonyms: inborn_reflex innate_reflex instinctive_reflex unconditioned_reflex physiological_reaction
Related terms: reaction fart belch gulp electric_shock gooseflesh tremble vomit yawn startle suckling_reflex defecation_reflex blink micturition_reflex gag_reflex mydriasis Babinski light_reflex rooting_reflex sneeze hiccup goose_bump hiccup myotactic_reflex knee_jerk plantar_reflex blush accommodation_reflex
2. [ adjective ] (physiology) without volition or conscious control
Synonyms: automatic reflexive

"the automatic shrinking of the pupils of the eye in strong light" "a reflex knee jerk" "sneezing is reflexive"

Related terms: physiology involuntary
Similar spelling:   reflexly