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Dall sheep(dôl) or Dall's sheep (dôlz)
A large wild sheep (Ovis dalli) of the mountainous regions of northwest North America, ranging in color from white to nearly black and having large, curved horns.
[After William Healey Dall (1845-1927), American naturalist.]
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.