trochiscus

from The Collaborative International Dictionary of English v.0.48

Trochiscus \Tro*chis"cus\, n.; pl. {Trochisci}. [L., fr. Gr. ? a
   small ball, dim. of ? a wheel. See {Troche}.] (Pharm.)
   A kind of tablet or lozenge; a troche.
   [1913 Webster]