Wordnet 3.0
NOUN (1)
1. 
 talipes in which the toes are pointed upward and the person walks on the heel of the foot; 
The Collaborative International Dictionary of English v.0.48:
Talus \Ta"lus\, n.; pl. Tali. [L., the ankle, the ankle bone.]
   1. (Anat.) The astragalus.
      [1913 Webster]
   2. (Surg.) A variety of clubfoot (Talipes calcaneus). See
      the Note under Talipes.
      [1913 Webster]
WordNet (r) 3.0 (2006):
talipes calcaneus
    n 1: talipes in which the toes are pointed upward and the person
         walks on the heel of the foot