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Meaning of Colorado tick fever

Col'orad'o tick' fe"ver

Pronunciation: [key]
— Pathol. Pathol.
  1. a usually mild viral disease occurring in the Rocky Mountain regions of the United States, carried by a tick, Dermacentor andersoni, and characterized by fever, sensitivity to light, headache, and leg and back pain.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.