The Collaborative International Dictionary of English v.0.48:

orthopedics \orthopedics\ n. [Ortho- + Gr. ?, ?, a child.]
   (Med.)
   The art or practice of correcting disorders or deformities of
   the spine and joints, or, by extension, any deformities of
   the human body.

   Syn: orthopaedics, orthopedy.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

orthopedics
    n 1: the branch of medical science concerned with disorders or
         deformities of the spine and joints [syn: orthopedics,
         orthopaedics]