In German-speaking countries, the usual term for a sparkling wine produced according to certain quality criteria; among other things, it must be produced from quality wine with a second fermentation. The individual regulations (e.g. alcohol content, maturation time on the yeast, etc.) are partly different in Germany and Austria. This may also be called sparkling wine. See the individual steps under Champagne.
The glossary is a monumental achievement and one of the most important contributions to wine knowledge. Of all the encyclopaedias I use on the subject of wine, it is by far the most important. That was the case ten years ago and it hasn't changed since.Andreas Essl