|Also called: recurrent fever any of various infectious diseases characterized by recurring fever, caused by the bite of body lice or ticks infected with spirochaetes of the genus Borrelia|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a gadget; dingus; thingumbob.|
relapsing fever n.
An acute infectious disease caused by a strain of Borrelia transmitted by lice or ticks and marked by recurring febrile attacks lasting about six days and separated from one other by apyretic intervals of about the same length. Also called recurrent fever.