资料来源 : pyDict

内弯足的,八字脚的,

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Knock-kneed \Knock"-kneed`\, a.
   Having the legs bent inward so that the knees touch in
   walking. [Written also {knack-kneed}.]

资料来源 : WordNet®

knock-kneed
     adj : having the knees abnormally close together and the ankles
           wide apart