Knock-knee n. : A condition in which the knees are bent in so as to touch each other in walking; inknee.

Example:


Taxonomy
Genu valgum, knee, free encyclopedia, legs, knock knees, valgus, deformities, adults, knee problems, knee replacement, patella, extension, flexion, search, external resources, knock-knees, one another, Females.

Defination from the web:
... Adults with uncorrected genu valgum are typically prone to injury and chronic knee problems such as chondromalacia and osteoarthritis. ...