emanation

Short definition from Wiktionary

Noun

1. 1
   The act of flowing or proceeding (of something, quality, or feeling) from a source or origin.
2. 2
   That which issues, flows, or proceeds from any object as a source; efflux; an effluence.
3. 3
   (physics, chemistry) The element radon (Rn)
4. 4
   The generation of the Son and the procession of the Holy Spirit, as distinct from the origination of created beings.