Definition from Wiktionary, the free dictionary
- An extract from the bark of the soapbark tree, Quillaja saponaria, used as a food additive.
1906 February 24, Pharmaceutical Journal, page 204:
- Although the emulsifying properties of quillaia are mentioned in every text-book, yet its advantages do not appear to be generally known or made use of.
extract from the bark of Quillaja saponaria