fin /ˈfɪn/
 鰭,魚翅,鰭狀物,五元紙幣(vi.)猛揮鰭(vt.)裝上翅,切除鰭


 fin
 散熱片


 Fin v. t. [imp. & p. p. Finned p. pr. & vb. n. Finning.]  To carve or cut up, as a chub.


 Fin, n.  End; conclusion; object. [Obs.] “She knew eke the fin of his intent.”


 Fin, n.
 1. Zool. An organ of a fish, consisting of a membrane supported by rays, or little bony or cartilaginous ossicles, and serving to balance and propel it in the water.
 Note: ☞ Fishes move through the water chiefly by means of the caudal fin or tail, the principal office of the other fins being to balance or direct the body, though they are also, to a certain extent, employed in producing motion.
 2. Zool. A membranous, finlike, swimming organ, as in pteropod and heteropod mollusks.
 3. A finlike organ or attachment; a part of an object or product which protrudes like a fin, as: (a) The hand. [Slang] (b) Com. A blade of whalebone. [Eng.]   (c) Mech. A mark or ridge left on a casting at the junction of the parts of a mold. (d) Mech. The thin sheet of metal squeezed out between the collars of the rolls in the process of rolling.
 (e) Mech. A feather; a spline.
 4. A finlike appendage, as to submarine boats.
 5. Aëronautics A fixed stabilizing surface, usually vertical, similar in purpose to a bilge keel on a ship.
 Apidose fin. Zool. See under Adipose, a.
 Fin ray Anat., one of the hornlike, cartilaginous, or bony, dermal rods which form the skeleton of the fins of fishes.
 Fin whale Zool., a finback.
 Paired fins Zool., the pectoral and ventral fins, corresponding to the fore and hind legs of the higher animals.
 Unpaired fins, or Median fins Zool., the dorsal, caudal, and anal fins.

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 fin
      n 1: the cardinal number that is the sum of four and one [syn: five,
            5, V, cinque, quint, quintet, fivesome, quintuplet,
            pentad, Phoebe, Little Phoebe]
      2: one of a pair of decorations projecting above the rear
         fenders of an automobile [syn: tail fin, tailfin]
      3: one of a set of parallel slats in a door or window to admit
         air and reject rain [syn: louver, louvre]
      4: a shoe for swimming; the paddle-like front is an aid in
         swimming (especially underwater) [syn: flipper, flippers,
          fins]
      5: a stabilizer that resembles the fins of a fish
      6: organ of locomotion and balance in fishes and some other
         aquatic animals
      v 1: equip (a car) with fins
      2: propel oneself through the water in a finning motion
      3: show the fins above the water while swimming; "The sharks
         were finning near the surface" [syn: break water]
      [also: finning, finned]