WordReference Random House Unabridged Dictionary of American English © 2026
Col′orad′o tick′ fe′ver, [Pathol.]
  1. Pathologya 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.
  • 1955–60


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