dromedary

1. (medicine, dated, attributively) Referring to a biphasic clinical course of poliomyelitis, typically occurring in children, characterized by a minor illness, followed by an asymptomatic period of several days before the onset of a major illness involving the central nervous system.Examples: "The untreated cases have been arranged in three groups according to the clinical course. The first group, called the dromedary group, shows the curious phenomenon of two different periods of illness with an interval of well-being. […] Because of the two distinct groups or humps of symptoms, the analogy to the arrangement of the dromedary’s back was taken to express the type figuratively."attributivedated