/troh"kee/ , n. Pharm.
a small tablet or lozenge, usually a circular one, made of medicinal substance worked into a paste with sugar and mucilage or the like, and dried.
[ 1590-1600; back formation from troches, earlier tro ( s ) chies, late ME trocis (taken as pl.) trocisse trochiscus trochískos, equiv. to troch ( ós ) wheel (akin to tréchein to run) + -iskos dim. suffix ]