The Collaborative International Dictionary of English v.0.48:

Rorulent \Ro"ru*lent\, a. [L. rorulentus, from ros, roris, dew.]
   1. Full of, or abounding in, dew. [R.]
      [1913 Webster]

   2. (Zool.) Having the surface appearing as if dusty, or
      covered with fine dew.
      [1913 Webster]