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• BABINSKI REFLEX (noun) The noun BABINSKI REFLEX has 1 sense: 1. extension upward of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front; normal in infants under the age of two years but a sign of brain or spinal cord injury in older persons Familiarity information: BABINSKI REFLEX used as a noun is very rare.
