reflex

/ɹˈiflɛks/ · 2 syllables

Meaning

noun

1. an automatic instinctive unlearned reaction to a stimulus

adjective

1. without volition or conscious control
   “the automatic shrinking of the pupils of the eye in strong light”

Synonyms for reflex

• reflex response
• reflex action
• instinctive reflex
• innate reflex
• inborn reflex
• unconditioned reflex
• physiological reaction
• automatic
• reflexive
• involuntary