The Collaborative International Dictionary of English v.0.48:

Salep \Sal"ep\ (s[a^]l"[e^]p), n. [Ar. sahleb, perhaps a
   corruption of an Arabic word for fox, one Ar. name of the
   orchis signifying literally, fox's testicles: cf. F. salep.]
   [Written also saleb, salop, and saloop.]
   The dried tubers of various species of Orchis, and
   Eulophia. It is used to make a nutritious beverage by
   treating the powdered preparation with hot water. --U. S.
   Disp.
   [1913 Webster]