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A lake trout (Salvelinus namaycush subsp. siscowet) that has a large amount of body fat and is found only in Lake Superior.
[Short for Ojibwa pēmitēwiskawēt : pimitēw-, oil + iskawē, to have flesh of a specified type.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.