Definition of Knock-knees

Knock-knees: An abnormal curve of the legs that causes the knees to touch or nearly touch while the feet are apart. The problem may arise in the bone structure itself, or in some cases it develops gradually as a result of muscle abnormalities. Knock- knees can cause movement difficulties, muscle and bone strain, and pain from overstress on the ankles. The condition can be helped via physical therapy, and in some cases corrected with surgery. Also called genu valgum.