1. (noun) an automatic instinctive unlearned reaction to a stimulus

• inborn reflex
• instinctive reflex
• physiological reaction
• reflex
• reflex action
• reflex response
• unconditioned reflex

1. (noun) an automatic instinctive unlearned reaction to a stimulus

• accommodation reflex
• babinski
• babinski reflex
• babinski sign
• belch
• belching
• burp
• burping
• eructation
• blink
• blinking
• eye blink
• nictation
• nictitation
• wink
• winking
• blush
• flush
• breaking wind
• fart
• farting
• flatus
• wind
• defecation reflex
• rectal reflex
• disgorgement
• emesis
• puking
• regurgitation
• vomit
• vomiting
• electric shock
• electrical shock
• shock
• gag reflex
• pharyngeal reflex
• goose bump
• goose pimple
• goose skin
• goosebump
• gooseflesh
• horripilation
• pilomotor reflex
• gulp
• gulping
• hiccough
• hiccup
• singultus
• jump
• start
• startle
• knee jerk
• knee-jerk reflex
• patellar reflex
• light reflex
• miosis
• myosis
• pupillary reflex
• micturition reflex
• mydriasis
• myotactic reflex
• stretch reflex
• oscitance
• oscitancy
• yawn
• yawning
• plantar reflex
• rooting reflex
• shake
• shiver
• tremble
• sneeze
• sneezing
• sternutation
• suckling reflex

1. (noun) an automatic instinctive unlearned reaction to a stimulus

• reaction
• response

1. (noun) an automatic instinctive unlearned reaction to a stimulus

• automatic
• reflex
• reflexive