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Wiktionary
genu varum

n. (context medical English) bowleg

WordNet
genu varum

n. a leg bowed outward at the knee (or below the knee) [syn: bowleg, tibia vara]

Wikipedia
Genu varum

'''Genu varum ''' (also called bow-leggedness, bandiness, bandy-leg, and tibia vara), is a physical deformity marked by (outward) bowing of the lower leg in relation to the thigh, giving the appearance of an archer's bow. Usually medial angulation of both femur and tibia is involved.