Re: Beer Definition
Technically a Geuze is a young lambic beer mixed with an old one, eg. one batch that has been fermenting for a year with another that's been fermenting for 3 years.
An unadultarated lambic is a wild fermented beer from the Zenne valley near Brussels. Apparently the yeast that makes it a lambic only lives there. And it has to be wild brewed, you can;t export the yeast from the valley and make it somewhere else or it's not lambic.
There is also Faro, which is a lambic with added sugar, but it used to be a way of serving lambics, where you poured it slowly over a sugar cube on a spoon to sweeten it to taste. It's lovely on a hot day.