1) Contamination 2) Efflux 3) Egress 1) Efflux 2) Emanation 3) Flow 4) Outflow 5) Something that flows out 6) The process of flowing out 
• (n.) A flowing out, or emanation. • (n.) That which flows or issues from any body or substance; issue; efflux.
1. A flowing out, or emanation. ... 2. That which flows or issues from any body or substance; issue; efflux. 'Bright effluence of bright essence increate!' (Milton) '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) ... Origin: Cf. F. Effluence. ... Source: W...
Ef'flu·ence noun [ Confer French effluence .] 1. A flowing out, or emanation. 2. That which flows or issues from any body or substance; issue; efflux. « Bright effluence of bright essence increate!» Milton. « And, as if the gloom of the earth ...
the action or process of flowing out; efflux. · something that flows out; emanation.