knock knee

/ˈnɑk ˌni/
noun
  1. A condition in which a person's knees touch each other when standing straight, while the ankles are apart.
    • The doctor diagnosed the child with knock-knee and recommended special exercises.
    • She wore braces for a year to treat her knock-knee.
    • Knock-knee is common in young children and often corrects itself as they grow.
Antonyms