1. (

• reflex ,
• reflex_response ,
• reflex_action ,
• instinctive_reflex ,
• innate_reflex ,
• inborn_reflex ,
• unconditioned_reflex ,
• physiological_reaction

) an automatic instinctive unlearned reaction to a stimulus ;

1. (

• automatic ,
• reflex ,
• reflexive

) without volition or conscious control; "the automatic shrinking of the pupils of the eye in strong light"; "a reflex knee jerk"; "sneezing is reflexive" ;