Definitions for koumiss
an alcoholic beverage made from fermented mare's milk; made originally by nomads of central Asia
A fermented drink made from mare's milk, common among peoples of the Central Asian steppes.
Origin: Via koumis, Kumiss, from кумыс, borrowed from a source. Compare Tatar кымыз, Kazakh қымыз, Kyrgyz кымыз, Turkish kımız, Azeri qımız.
an intoxicating fermented or distilled liquor originally made by the Tartars from mare's or camel's milk. It can be obtained from any kind of milk, and is now largely made in Europe
The Nuttall Encyclopedia
an intoxicating beverage among the Kalmucks, made by fermentation from mare's milk.