Source : Webster's Revised Unabridged Dictionary (1913)

Breakbone fever \Break"bone` fe`ver\ (Med.)
   See {Dengue}.

Source : WordNet®

breakbone fever
     n : an infectious disease of the tropics transmitted by
         mosquitoes and characterized by rash and aching head and
         joints [syn: {dengue}, {dengue fever}, {dandy fever}]