The Collaborative International Dictionary of English v.0.48:

Cadent \Ca"dent\, a. [L. cadens, -entis, p. pr. of cadere to
   fall.]
   Falling. [R.] "Cadent tears." --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cadent
    adj 1: marked by a rhythmical cadence; "the cadenced crunch of
           marching feet" [syn: cadenced, cadent]