knock-knee

noun

1. inward curvature of the legs, causing the knees to knock together in walking.
2. knock-knees, the knees of a person whose legs have such curvature.

noun

1. a condition in which the legs are bent inwards causing the knees to touch when standingTechnical name: genu valgum

n.

1. A deformity of the legs in which the knees are abnormally close together and the ankles are spread widely apart.