tartarine

Century Dictionary and Cyclopedia

1. n. Potash.
2. n. A kind of rich silk or brocade, supposed to be made by the Tatars, but probably silk of China, India, etc., brought overland by them to Europe. Also called tartarium and cloth of Tars. Compare tarse. A fabric of linen and wool used for linings, etc., was also called tartarine in the fifteenth century.

Wiktionary

1. n. chemistry, obsolete Potassium carbonate, obtained by the incineration of tartar.

GNU Webster's 1913

1. n. (Old Chem.), obsolete Potassium carbonate, obtained by the incineration of tartar.