Fining

Part of speech: noun (n.)

1. The act of imposing a fin

2. The process of fining or refining; clarification; also (Metal.), the conversion of cast iron into suitable for puddling, in a hearth or charcoal fire.

3. That which is used to refine; especially, a preparation of isinglass, gelatin, etc., for clarifying beer. Fining pot, a vessel in which metals are refined. Prov. xvii. 3.