Medical Dictionary


noun re·flex \ˈrē-ˌfleks\

Medical Definition of REFLEX

a :  reflected heat, light, or color b :  a mirrored image
a :  an automatic and often inborn response to a stimulus that involves a nerve impulse passing inward from a receptor to the spinal cord and thence outward to an effector (as a muscle or gland) without reaching the level of consciousness and often without passing to the brain <the knee-jerk reflex> b :  the process that culminates in a reflex and comprises reception, transmission, and reaction c reflexes pl :  the power of acting or responding with adequate speed
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