c1386Sal tartre [see sense 1]. 1471 G. Ripley Compound of Alchymy Adm. v. in E. Ashmole (1652) 190 Sal Tarter, sal Comyn, sal Geme most clere.
1612 B. Jonson i. iii. sig. C3 I, I know, you'haue Arsnike, Vitriol, Sal Tartre, Argaile, Alkaly, Cinoper. View more context for this quotation
1683 J. Pettus Ess. Metallick Words at Salt, in ii Sal Tartar.