A producer of something, or an agent in the production of something.
-in
(biochemistry) Used, as a modification of -ine, to form the names of a variety of types of compound; examples include proteins (globulin), carbohydrates (dextrin), dyes (alizarin) and others (vanillin).
词源说明
From -gen + -in, i.e. a compound (-in) formed from another compound (-gen).