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black-tailed deer

[blak-teyld]
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noun
  1. a variety of mule deer, Odocoileus hemionus columbianus, of the western slope of the Rocky Mountains, having a tail that is black above.
Also blacktail deer [blak-teyl] /ˈblækˌteɪl/.

Origin of black-tailed deer

An Americanism dating back to 1800–10
Also called black·tail.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018