lake trout

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

• noun A freshwater food and game fish (Salvelinus namaycush) having a dark body with light-colored spots and a forked tail fin, native to North America and widely introduced elsewhere.

from The Century Dictionary.

• noun A fish, Galaxias auratus, of the family Galaxidæ, found in Tasmania.
• noun The common salmon-trout of western North America, Salmo purpuratus; the Rocky Mountain brook-trout; the Yellowstone trout.
• noun The Mackinaw trout, Salvelinus namaycush, more fully called the great lake-trout; the longe of Vermont; the togue of Maine.

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

• noun A large species of trout found in lakes in North America, Salvelinus namaycush

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

• noun large fork-tailed trout of lakes of Canada and the northern United States
• noun flesh of large trout of northern lakes