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 De·vo·ni·an a. Geol. Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system.
 Devonian age Geol., the age next older than the Carboniferous and later than the Silurian; -- called also the Age of fishes. The various strata of this age compose the Devonian formation or system, and include the old red sandstone of Great Britain. They contain, besides plants and numerous invertebrates, the bony portions of many large and remarkable fishes of extinct groups. See the Diagram under Geology.

 Fish, n.; pl. Fishes or collectively, Fish.
 1. A name loosely applied in popular usage to many animals of diverse characteristics, living in the water.
 2. Zool. An oviparous, vertebrate animal usually having fins and a covering scales or plates. It breathes by means of gills, and lives almost entirely in the water. See Pisces.
 Note: ☞ The true fishes include the Teleostei (bony fishes), Ganoidei, Dipnoi, and Elasmobranchii or Selachians (sharks and skates). Formerly the leptocardia and Marsipobranciata were also included, but these are now generally regarded as two distinct classes, below the fishes.
 3. pl. The twelfth sign of the zodiac; Pisces.
 4. The flesh of fish, used as food.
 5. Naut. (a) A purchase used to fish the anchor. (b) A piece of timber, somewhat in the form of a fish, used to strengthen a mast or yard.
 Note: ☞ Fish is used adjectively or as part of a compound word; as, fish line, fish pole, fish spear, fish-bellied.
 Age of Fishes. See under Age, n., 8.
 Fish ball, fish (usually salted codfish) shared fine, mixed with mashed potato, and made into the form of a small, round cake. [U.S.]
 Fish bar. Same as Fish plate (below).
 Fish beam Mech., a beam one of whose sides (commonly the under one) swells out like the belly of a fish. --Francis.
 Fish crow Zool., a species of crow (Corvus ossifragus), found on the Atlantic coast of the United States. It feeds largely on fish.
 Fish culture, the artifical breeding and rearing of fish; pisciculture.
 Fish davit. See Davit.
 Fish day, a day on which fish is eaten; a fast day.
 Fish duck Zool., any species of merganser.
 Fish fall, the tackle depending from the fish davit, used in hauling up the anchor to the gunwale of a ship.
 Fish garth, a dam or weir in a river for keeping fish or taking them easily.
 Fish glue. See Isinglass.
 Fish joint, a joint formed by a plate or pair of plates fastened upon two meeting beams, plates, etc., at their junction; -- used largely in connecting the rails of railroads.
 Fish kettle, a long kettle for boiling fish whole.
 Fish ladder, a dam with a series of steps which fish can leap in order to ascend falls in a river.
 Fish line, or Fishing line, a line made of twisted hair, silk, etc., used in angling.
 Fish louse Zool., any crustacean parasitic on fishes, esp. the parasitic Copepoda, belonging to Caligus, Argulus, and other related genera. See Branchiura.
 Fish maw Zool., the stomach of a fish; also, the air bladder, or sound.
 Fish meal, fish desiccated and ground fine, for use in soups, etc.
 Fish oil, oil obtained from the bodies of fish and marine animals, as whales, seals, sharks, from cods' livers, etc.
 Fish owl Zool., a fish-eating owl of the Old World genera Scotopelia and Ketupa, esp. a large East Indian species (K. Ceylonensis).
 Fish plate, one of the plates of a fish joint.
 Fish pot, a wicker basket, sunk, with a float attached, for catching crabs, lobsters, etc.
 Fish pound, a net attached to stakes, for entrapping and catching fish; a weir. [Local, U.S.] --Bartlett.
 Fish slice, a broad knife for dividing fish at table; a fish trowel.
 Fish slide, an inclined box set in a stream at a small fall, or ripple, to catch fish descending the current. --Knight.
 Fish sound, the air bladder of certain fishes, esp. those that are dried and used as food, or in the arts, as for the preparation of isinglass.
 Fish story, a story which taxes credulity; an extravagant or incredible narration. [Colloq. U.S.] --Bartlett.
 Fish strainer. (a) A metal colander, with handles, for taking fish from a boiler. (b) A perforated earthenware slab at the bottom of a dish, to drain the water from a boiled fish.
 Fish trowel, a fish slice.
 Fish weir or Fish wear, a weir set in a stream, for catching fish.
 Neither fish nor flesh, Neither fish nor fowl (Fig.), neither one thing nor the other.

 Age of Fishes
      n : from 405 million to 345 million years ago; dominance of
          fishes and appearance of amphibians and ammonites [syn: Devonian,
           Devonian period]