The Collaborative International Dictionary of English v.0.48:

Emanation \Em`a*na"tion\, n. [L. emanatio: cf. F. ['e]manation.]
   1. The act of flowing or proceeding from a fountain head or
      origin. --South.
      [1913 Webster]

            Those profitable and excellent emanations from God.
                                                  --Jer. Taylor.
      [1913 Webster]

   2. That which issues, flows, or proceeds from any object as a
      source; efflux; an effluence; as, perfume is an emanation
      from a flower.
      [1913 Webster]

            An emanation of the indwelling life.  --Bryant.
      [1913 Webster]

WordNet (r) 3.0 (2006):

emanation
    n 1: something that is emitted or radiated (as a gas or an odor
         or a light, etc.)
    2: the act of emitting; causing to flow forth [syn: emission,
       emanation]
    3: (theology) the origination of the Holy Spirit at Pentecost;
       "the emanation of the Holy Spirit"; "the rising of the Holy
       Ghost"; "the doctrine of the procession of the Holy Spirit
       from the Father and the Son" [syn: emanation, rise,
       procession]

Moby Thesaurus II by Grady Ward, 1.0:

55 Moby Thesaurus words for "emanation":
   aroma, aura, breath, definite odor, detectable odor, diffusion,
   discharge, dispersion, ectoplasm, ectoplasy, effluvium, emergence,
   emersion, emission, essence, exhalation, exteriorized protoplasm,
   extrusion, flavor, fragrance, fume, highlight, illumination,
   irradiance, irradiancy, irradiation, issuance, issue, light,
   light source, luminous energy, odor, photosensitivity, radiance,
   radiancy, radiant energy, radiation, radius, ray, redolence, savor,
   scattering, scent, sidelight, smell, spoke, spoor, stench,
   subtle odor, surfacing, trace, trail, vent, visible radiation,
   whiff