[1] : The Collaborative International Dictionary of English v.0.48

grizzly \griz"zly\, a.
   somewhat gray; grizzled.
   1913 webster

         old squirrels that turn grizzly.         --bacon.
   1913 webster

   grizzly bear zool., a large and ferocious bear ursus
      horribilis of western north america and the rocky
      mountains. it is remarkable for the great length of its
      claws.
      1913 webster
see also:
grizzly bear ursus horribilis 

[2] : The Collaborative International Dictionary of English v.0.48

bear \bear\ b^ar, n. oe. bere, as. bera; akin to d. beer,
   ohg. bero, pero, g. baumr, icel.  sw. bj"orn, and
   possibly to l. fera wild beast, gr. fh`r beast, skr. bhalla
   bear.
   1913 webster
   1. zool. any species of the genus ursus, and of the
      closely allied genera. bears are plantigrade carnivora,
      but they live largely on fruit and insects.
      1913 webster

   note: the european brown bear ursus arctos, the white
         polar bear ursus maritimus, the grizzly bear
         ursus horribilis, the american black bear, and its
         variety the cinnamon bear ursus americanus, the
         syrian bear ursus syriacus, and the sloth bear, are
         among the notable species.
         1913 webster

   2. zool. an animal which has some resemblance to a bear in
      form or habits, but no real affinity; as, the woolly bear;
      ant bear; water bear; sea bear.
      1913 webster

   3. astron. one of two constellations in the northern
      hemisphere, called respectively the great bear and the
      lesser bear, or ursa major and ursa minor.
      1913 webster

   4. metaphorically: a brutal, coarse, or morose person.
      1913 webster

   5. stock exchange a person who sells stocks or securities
      for future delivery in expectation of a fall in the
      market.
      1913 webster

   note: the bears and bulls of the stock exchange, whose
         interest it is, the one to depress, and the other to
         raise, stocks, are said to be so called in allusion to
         the bear's habit of pulling down, and the bull's of
         tossing up.
         1913 webster

   6. mach. a portable punching machine.
      1913 webster

   7. naut. a block covered with coarse matting; -- used to
      scour the deck.
      1913 webster

   australian bear. zool. see koala.

   bear baiting, the sport of baiting bears with dogs.

   bear caterpillar zool., the hairy larva of a moth, esp.
      of the genus euprepia.

   bear garden.
      a a place where bears are kept for diversion or
          fighting.
      b any place where riotous conduct is common or
          permitted. --m. arnold.

   bear leader, one who leads about a performing bear for
      money; hence, a facetious term for one who takes charge of
      a young man on his travels.
      1913 webster
see also:
ursus carnivora ursus arctos ursus maritimus ursus horribilis ursus americanus 
ursus syriacus great bear lesser bear ursa major ursa minor 
australian bear koala bear baiting bear caterpillar euprepia 
bear garden bear leader 

[3] : WordNet (r) 2.0

ursus horribilis
     n : powerful brownish-yellow bear of the uplands of western
         north america syn: grizzly, grizzly bear, silvertip,
          silver-tip, ursus arctos horribilis
see also:
grizzly grizzly bear silvertip silver-tip ursus arctos horribilis 

Ursus >> U Words
Ursus, definition of term: Ursus
ursus_pag1.html

Ursus Horribili >> U Words
Ursus Horribili, definition of term: Ursus Horribili
ursus+horribili_pag1.html

Ursus Americanu >> U Words
Ursus Americanu, definition of term: Ursus Americanu
ursus+americanu_pag1.html

Ursus Arctos >> U Words
Ursus Arctos, definition of term: Ursus Arctos
ursus+arctos_pag1.html