solera
sustantivo:femenino
Sherry does not have a specific vintage since it is a mixture of the vintages from different years; the solera method is used to ensure uniformity of quality. In the bodega (cellar) the casks are arranged in horizontal rows, with the bottom row, known as the solera, containing the oldest wine. When part of this is bottled, the casks are replenished with wine from the row immediately above, which in turn is refilled with wine from the next row, and so on.
solerabodegasolera