The Collaborative International Dictionary of English v.0.48:

Centesimal \Cen*tes"i*mal\, a. [L. centesimus the hundredth, fr.
   centum a hundred: cf. F. cent['e]simal.]
   Hundredth. -- n. A hundredth part.
   [1913 Webster]

         The neglect of a few centesimals.        --Arbuthnot.
   [1913 Webster]

WordNet (r) 3.0 (2006):

centesimal
    adj 1: relating to or divided into hundredths
    2: the ordinal number of one hundred in counting order [syn:
       hundredth, centesimal, 100th]