The Collaborative International Dictionary of English v.0.48:

Effluence \Ef"flu*ence\, n. [Cf. F. effluence.]
   1. A flowing out, or emanation.
      [1913 Webster]

   2. That which flows or issues from any body or substance;
      issue; efflux.
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            Bright effluence of bright essence increate!
                                                  --Milton.
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            And, as if the gloom of the earth and sky had been
            but the effluence of these two mortal hearts, it
            vanished with their sorrow.           --Hawthorne.
      [1913 Webster]

WordNet (r) 3.0 (2006):

effluence
    n 1: the process of flowing out [syn: outflow, effluence,
         efflux] [ant: inflow, influx]