noun
: a reflex downward movement of the foot due to a spasmodic contraction of the muscles of the calf caused by sudden extension of the leg or by striking the Achilles' tendon above the heel
noun
: a reflex downward movement of the foot due to a spasmodic contraction of the muscles of the calf caused by sudden extension of the leg or by striking the Achilles' tendon above the heel
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012