The"ri*ac (?), The*ri"a*ca (?), n. [L. theriaca an antidote against the bite of serpents, Gr. : cf. F. th'eriaque. See Treacle.]
1. Old Med.
An ancient composition esteemed efficacious against the effects of poison; especially, a certain compound of sixty-four drugs, prepared, pulverized, and reduced by means of honey to an electuary; -- called also theriaca Andromachi, and Venice treacle.
© Webster 1913.