1. 
   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...
   Found op http://www.medterms.com/script/main/art.html?articlekey=4117
   
   
2. 
   knock-knees
   In medicalese: there are no knock-knees. The condition is genu valgum. ... (12 Dec 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?knock-knees
   
   

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