D defs.my
Entry 3 senses Webster, 1913

Fining

/fīn'-ĭng/ · Fin·ing · IPA /ˈfaɪnɪŋ/
01 n. The act of imposing a fin�.
  1. 1.
    The act of imposing a fin�.
  2. 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.(Metal.)
  3. 3.
    That which is used to refine; especially, a preparation of isinglass, gelatin, etc., for clarifying beer.
Phrases & compounds
Fining pot — a vessel in which metals are refined.