Definition from Wiktionary, the free dictionary
- Alternative spelling of kefir.
(Can we date this quote?) Various, Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2:
- In addition to such cases as the kephir and ginger-beer plants (figs. 19, 20), where anaerobic bacteria are associated with yeasts, several interesting examples of symbiosis among bacteria are now known.