The Collaborative International Dictionary of English v.0.48:

Pedology \Pe*dol"o*gy\, n. [Gr. pai^s, paido`s, child + -logy.]
   (Med.)
   Pediatrics.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

pedology
    n 1: the branch of medicine concerned with the treatment of
         infants and children [syn: pediatrics, paediatrics,
         pediatric medicine, pedology]