Source : Webster's Revised Unabridged Dictionary (1913)

Canescent \Ca*nes"cent\, a. [L. canescens, p. pr. of canescere,
   v. inchoative of canere to be white.]
   Growing white, or assuming a color approaching to white.

Source : WordNet®

canescent
     adj 1: grayish white; "the canescent moon"
     2: covered with fine whitish hairs or down [syn: {hoary}]