The Collaborative International Dictionary
Theriacal
Theriac \The"ri*ac\, Theriacal \The*ri"a*cal\, a. [Cf. F.
th['e]riacal.]
Of or pertaining to theriac; medicinal. ``Theriacal herbs.''
--Bacon.
Wiktionary
theriacal
a. (context obsolete English) Of or relating to theriac; medicinal.
Usage examples of "theriacal".
Princess and Kedrigern supervised his treatment, swabbing his face with healing waters at sunrise and sunset and applying a theriacal salve of great potency four times a day.