Obs. Forms: 5 tiriacle, 6 tyriakle, 7 theriacle, -cal. [a. OF. tiriacie, ter(i)acle (15th c. in Godef., Compl.), beside OF. triacle (12th c.); popular alterations of tiriaque, thériaque, THERIAC: see also TREACLE.] = THERIAC, TREACLE sb. 1.
c. 1400. Maundev. (Roxb.), xxi. 94. Tiriacle may noȝt helpe ne nan oþer medecyne.
1561. Hollybush, Hom. Apoth., 29. Geue him … a penyweyght of fyne Tyriakle.
1647. Trapp, Comm. Acts xxviii. 5. A wholesome theriacle…, or treacle, as we call it.
1681. trans. Willis’ Rem. Med. Wks., Vocab., Theriacal, or treacle, a medicine … invented against poysons.
1730–6. Bailey (folio), Theri′aca, Theri′ace, Theri′acle, Treacle.
