Look up: solera

1. Solera
   A system for ageing sherry, consisting of a series of barrels (known as butts), arranged next to and top of each other. It's all rather complex, but in simplest terms when wine is drawn off for bottling from an old barrel, this barrel is then topped-up with younger wine from another barrel. Thus, if...
   Found on http://www.surf4wine.co.uk/glossary.html
   
   
2. Solera
   When ageing Generoso wines, the last phase in the process. Wine is periodically drawn from the lower casks which never move, and refreshed with an equal quantity of wine from a criadera or cask above. The name solera is derived from the fact that traditionally the last casks used in this phase are those nearest to the floor (suelo in Spanish).
   Found on http://www.decanterwines.co.uk/page/span
   
   
3. Solera
   A process for the maturation of alcoholic beverages. Barrels are filled at various times. Upon maturation, the oldest barrel will be partly emptied and bottled, with some of its contents remaining. This barrel will be topped up with the some of the contents from the second oldest barrel. This, in tu...
   Found on http://www.masterofmalt.com/whisky-gloss
   
   
4. Solera
   `Solera` is a process for aging liquids such as wine, beer, vinegar, and brandy, by fractional blending in such a way that the finished product is a mixture of ages, with the average age gradually increasing as the process continues over many years. A solera is literally the set of barrels or...
   Found on http://en.wikipedia.org/wiki/Solera