The Collaborative International Dictionary of English v.0.48:

Cicatrix \Ci*ca"trix\, n.; pl. Cicatrices. [L.] (Med.)
   The pellicle which forms over a wound or breach of continuity
   and completes the process of healing in the latter, and which
   subsequently contracts and becomes white, forming the scar.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cicatrix
    n 1: a mark left (usually on the skin) by the healing of injured
         tissue [syn: scar, cicatrix, cicatrice]