DICT.TW Dictionary Taiwan

 Rak·er n.
 1. One who, or that which, rakes; as: (a) A person who uses a rake. (b) A machine for raking grain or hay by horse or other power. (c) A gun so placed as to rake an enemy's ship.
 2. Zool. See Gill rakers, under 1st Gill.
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 Gill n.
 1. Anat. An organ for aquatic respiration; a branchia.
    Fishes perform respiration under water by the gills.   --Ray.
 Note: ☞ Gills are usually lamellar or filamentous appendages, through which the blood circulates, and in which it is exposed to the action of the air contained in the water. In vertebrates they are appendages of the visceral arches on either side of the neck. In invertebrates they occupy various situations.
 2. pl. Bot. The radiating, gill-shaped plates forming the under surface of a mushroom.
 3. Zool. The fleshy flap that hangs below the beak of a fowl; a wattle.
 4. The flesh under or about the chin.
 5. Spinning One of the combs of closely ranged steel pins which divide the ribbons of flax fiber or wool into fewer parallel filaments.
 Gill arches, Gill bars. Anat. Same as Branchial arches.
 Gill clefts. Anat. Same as Branchial clefts. See under Branchial.
 Gill cover, Gill lid. See Operculum.
 Gill frame, or Gill head Flax Manuf., a spreader; a machine for subjecting flax to the action of gills. --Knight.
 Gill net, a flat net so suspended in the water that its meshes allow the heads of fish to pass, but catch in the gills when they seek to extricate themselves.
 Gill opening, or Gill slit Anat., an opening behind and below the head of most fishes, and some amphibians, by which the water from the gills is discharged.  In most fishes there is a single opening on each side, but in the sharks and rays there are five, or more, on each side.
 Gill rakes, or Gill rakers Anat., horny filaments, or progresses, on the inside of the branchial arches of fishes, which help to prevent solid substances from being carried into gill cavities.