great white shark

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A large shark (Carcharodon carcharias) of temperate and tropical waters that grows to about 6 meters (20 feet), is gray or blue-gray with a white underside, and feeds on fish and marine mammals.

from the GNU version of the Collaborative International Dictionary of English.

• a large shark (Carcharodon carcharias, class Chondrichtyes) usually found in warm seas. When young it is bluish but it becomes white with age. It grows to over 15 feet in length and is feared as a man-eater. Also called white shark and great white.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A large shark, Carcharodon carcharias, of coastal surface waters in all major oceans that feeds on fish and marine mammals.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun large aggressive shark widespread in warm seas; known to attack humans