santonateChem.|ˈsæntənət| [f. santon-ic + -ate1.] A salt of santonic acid. 1841Penny Cycl. XX. 409/1 Santonate of soda and santonate of lime.1874Garrod & Baxter Mat. Med. (1880) 293 Santonin..dissolves in solutions of the caustic fixed alkalies, forming definite compounds called santonates.