Wikipedia:

Grizzly Bear | grizzly bear | silvertip bear | Ursus arctos horribilis [species]

Summary:

a subspecies of brown bear that generally lives in the uplands of western North America. This subspecies is thought to descend from Ussuri brown bears which crossed to Alaska from Eastern Russia 100,000 years ago, though they did not move south until ...  (42 of 8303 words, 7 images)

Link:

http://en.wikipedia.org/wiki/Grizzly Bear  [cite]

Columbia:

grizzly bear | grizzly

Summary:

large, powerful North American brown bear, characterized by gray-streaked, or grizzled, fur. Grizzlies are 6 to 8 ft (180–250 cm) long, stand 3 1/2 to ...  (26 of 169 words)

Link:

http://www.infoplease.com/ce6/sci/A0821896.html  [cite]

Britannica:

grizzly bear

Summary:

traditional name given to brown bears of North America. Grizzly bears of the northern Rocky Mountains are classified as a subspecies, as are the huge ...  (25 of 99 words)

Link:

http://www.britannica.com/EBchecked/topic/246460/grizzly-bear  [cite]

Random House:

grizzly bear

Summary:

a large North American brown bear, Ursus (arctos) horribilis, with coarse, gray-tipped brown fur, once widespread in the western part of the continent ...  (23 of 58 words)

Link:

http://dictionary.infoplease.com/grizzly-bear  [cite]

Encarta:

grizzly bear | grizzly bears [plural] | grizzly: grizzlies [plural] | grizzlies [plural] | grizzly | Ursus arctos horribilis [Latin] | silvertip [United States, zoology] | silvertips [United States, zoology, plural]

Summary:

a brown bear that has brown fur tipped with white. Native to: northwestern North America. Latin name Ursus arctos horribilis.  (20 of 47 words, pronunciation)

Link:

http://encarta.msn.com/dictionary 1861691255/definition.html  [cite]

Merriam-Webster:

grizzly bear | grizzly | Ursus arctos [species]

Summary:

a very large brown bear found from the northwestern United States to Alaska —called also grizzly  (16 of 26 words)

Link:

http://www.merriam-webster.com/dictionary/grizzly bear  [cite]

Wiktionary:

Ursus arctos horribilis

Summary:

[taxonomy] A taxonomic subspecies within the species Ursus arctos — the grizzly bear.  (12 of 25 words, 1 etymology)

Link:

http://en.wiktionary.org/wiki/Ursus arctos horribilis  [cite]