dromedary

noun3

1. •
   The single-humped camel (Camelus dromedarius).

   • The duke in his schelde and dreches no lengere, / Drawes hym a dromedarie, with dredfulle knyghtez; […] — 1871
2. •
   Any swift riding camel.

   • [T]hou art like a swift dromedarie, that runneth by his wayes. — 1560
3. •
   [before a noun] (old-fashioned) 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.