Pollution - Vine's Expository Dictionary of New Testament Words
Pollution
[ 1,,G234, alisgema ]akin to a late verb alisgeo, to pollute," denotes "a pollution, contamination," Acts 15:20, "pollutions of idols," i.e., all the contaminating associations connected with idolatry including meats from sacrifices offered to idols.
Note: For miasma, AV, "pollutions," in 2 Peter 2:20, See DEFILEMENT, B, No. 1.