effervescent wine, 1660s, from French, short for vin de Champagne "wine made in Champagne," the former province in northeast France, literally "open country" (see campaign (n.)). Originally any wine from this region (especially from the vinyards south of Reims); the sense focused on the "sparkling" wines made there (the effervescence is artificially produced), then by late 18c. expanded to effervescent wines made anywhere.
