mammoth

[mam-uhth]
noun
1.
any large, elephantlike mammal of the extinct genus Mammuthus, from the Pleistocene Epoch, having hairy skin and ridged molar teeth.
adjective
2.
immensely large; huge; enormous: a mammoth organization.

Origin:
1690–1700; < Russian mam(m)ot (now mámont), first used in reference to remains of the animal found in Siberia; origin uncertain


2. See gigantic.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
mammoth (ˈmæməθ)
 
n
1.  any large extinct elephant of the Pleistocene genus Mammuthus (or Elephas), such as M. primigenius (woolly mammoth), having a hairy coat and long curved tusks
 
adj
2.  of gigantic size or importance
 
[C18: from Russian mamot, from Tatar mamont, perhaps from mamma earth, because of a belief that the animal made burrows]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

mammoth
1706, from Rus. mammot', probably from Ostyak (a Finno-Ugric language of northern Russia, cf. Finnish maa "earth"). Because the remains were dug from the earth, the animal was believed to root like a mole. The adj. is 1802 in Amer.Eng., in reference to the beasts' enormous size.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
mammoth   (mām'əth)  Pronunciation Key 
Any of various extinct elephants of the genus Mammuthus, having long, upwardly curving tusks and thick hair. Mammoths grew to great size and lived throughout the Northern Hemisphere during the Ice Age.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
On one side was a mammoth corporation, little loved on the left.
From micro shrimp to mammoth hippos, the planet's wetlands host miraculous
  diversity.
Alternatively, woolly mammoth anatomy may have varied through time and from
  region to region.
Above anything else, the woolly mammoth is an evolutionary icon for its role in
  proving the truth of extinction.
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