What is an effervescent liquor like kumiss, made from fermented milk, used as a food and as a medicine in the northern Caucasus. -- Ke*fir"ic (#), a called?

kefir — An effervescent liquor like kumiss, made from fermented milk, used as a food and as a medicine in the northern Caucasus. -- Ke*fir"ic (#), a. (Webster's 1913.)

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