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2 definitions found
 for Lamna nasus
From The Collaborative International Dictionary of English v.0.48 :

  Shark \Shark\ (sh[aum]rk), n. [Of uncertain origin; perhaps
     through OF. fr. carcharus a kind of dogfish, Gr. karchari`as,
     so called from its sharp teeth, fr. ka`rcharos having sharp
     or jagged teeth; or perhaps named from its rapacity (cf.
     Shark, v. t. & i.); cf. Corn. scarceas.]
     1. (Zool.) Any one of numerous species of elasmobranch fishes
        of the order Plagiostomi, found in all seas.
        [1913 Webster]
  
     Note: Some sharks, as the basking shark and the whale shark,
           grow to an enormous size, the former becoming forty
           feet or more, and the latter sixty feet or more, in
           length. Most of them are harmless to man, but some are
           exceedingly voracious. The man-eating sharks mostly
           belong to the genera Carcharhinus, Carcharodon, and
           related genera. They have several rows of large sharp
           teeth with serrated edges, as the great white shark
           ({Carcharodon carcharias or Carcharodon Rondeleti)
           of tropical seas, and the great blue shark
           ({Carcharhinus glaucus syn. Prionace glauca) of all
           tropical and temperate seas. The former sometimes
           becomes thirty-six feet long, and is the most voracious
           and dangerous species known. The rare man-eating shark
           of the United States coast ({Carcharodon Atwoodi) is
           thought by some to be a variety, or the young, of
           Carcharodon carcharias. The dusky shark
           ({Carcharhinus obscurus) is a common species on the
           coast of the United States of moderate size and not
           dangerous. It feeds on shellfish and bottom fishes.
           [1913 Webster]
  
     Note: The original 1913 Webster also mentioned a "smaller
           blue shark ({C. caudatus)", but this species could not
           be found mentioned on the Web (August 2002). The
           following is a list of Atlantic Ocean sharks:
           * * * * * * * * * * * * * * * *
           Common and Scientific Names of Atlantic Sharks
           * * * * * * * * * * * * * * * *
           from "Our Living Oceans 1995" (published by the
           National Printing Office):
           NMFS. 1999. Our Living Oceans. Report on the status of
           U.S. living marine resources, 1999. U.S. Dep. Commer.,
           NOAA Tech. Memo. NMFS-F/SPO-41, on-line version,
           http://spo.nwr.noaa.gov/olo99.htm.
           (the following list is found at at
           http://spo.nwr.noaa.gov/app5.pdf)
           (1) Pelagic Sharks
           Thresher shark ({Alopias vulpinus)
           Bigeye thresher ({Alopias superciliosus)
           Oceanic whitetip shark ({Carcharhinus longimanus)
           Sevengill shark ({Heptrachias perlo)
           Sixgill shark ({Hexanchus griseus)
           Bigeye sixgill shark ({Hexanchus vitulus)
           Shortfin mako ({Isurus oxyrinchus)
           Longfin mako ({Isurus paucus)
           Porbeagle ({Lamna nasus)
           Blue shark ({Prionace glauca)
           (2)Large Coastal Sharks
           Sandbar shark ({Carcharhinus plumbeus)
           Reef shark ({Carcharhinus perezi)
           Blacktip shark ({Carcharhinus limbatus)
           Dusky shark ({Carcharhinus obscurus)
           Spinner shark ({Carcharhinus brevipinna)
           Silky shark ({Carcharhinus falciformis)
           Bull shark ({Carcharhinus leucas)
           Bignose shark ({Carcharhinus altimus)
           Galapagos shark ({Carcharhinus galapagensis)
           Night shark ({Carcharhinus signatus)
           White shark ({Carcharodon carcharias)
           Basking shark ({Cetorhinus maximus)
           Tiger shark ({Galeocerdo cuvier)
           Nurse shark ({Ginglymostoma cirratum)
           Lemon shark ({Negaprion brevirostris)
           Ragged-tooth shark ({Odontaspis ferox)
           Whale shark ({Rhincodon typus)
           Scalloped hammerhead ({Sphyrna lewini)
           Great hammerhead ({Sphyrna mokarran)
           Smooth hammerhead ({Sphyrna zygaena)
           (3) Small Coastal Sharks
           Finetooth shark ({Carcharhinus isodon)
           Blacknose shark ({Carcharhinus acronotus)
           Atlantic sharpnose shark ({Rhizoprionodon erraenovae)
           Caribbean sharpnose shark ({Rhizoprionodon porosus)
           Bonnethead ({Sphyrna tiburo)
           Atlantic angel shark ({Squatina dumeril)
           [PJC]
  
     2. A rapacious, artful person; a sharper. [Colloq.]
        [1913 Webster]
  
     3. Trickery; fraud; petty rapine; as, to live upon the shark.
        [Obs.] --South.
        [1913 Webster]
  
     Basking shark, Liver shark, Nurse shark, Oil shark,
     Sand shark, Tiger shark, etc. See under Basking,
        Liver, etc. See also Dogfish, Houndfish,
        Notidanian, and Tope.
  
     Gray shark, the sand shark.
  
     Hammer-headed shark. See Hammerhead.
  
     Port Jackson shark. See Cestraciont.
  
     Shark barrow, the eggcase of a shark; a sea purse.
  
     Shark ray. Same as Angel fish
        (a), under Angel.
  
     Thrasher shark or Thresher shark, a large, voracious
        shark. See Thrasher.
  
     Whale+shark,+a+huge+harmless+shark+({Rhinodon+typicus">Whale shark, a huge harmless shark ({Rhinodon typicus) of
        the Indian Ocean. It becomes sixty feet or more in length,
        but has very small teeth.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  Lamna nasus
      n 1: voracious pointed-nose shark of northern Atlantic and
           Pacific [syn: porbeagle, Lamna nasus]

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