Webster's Revised Unabridged Dictionary · 1913

Blacktail

Blacktail ({not transcribed}) , noun

[Black + tail.]

1.
(Zoology) A fish; the ruff or pope.
2.
(Zoology) The black-tailed deer (Cervus Columbianus or Cariacus Columbianus) of California and Oregon; also, the mule deer of the Rocky Mountains. See Mule deer.