A term mostly associated with the Whisky industry, this means the amount of spirit lost through evaporation whilst ageing in barrels or casks. Typically no more than 2.5% per year.

The portion of a wine in an ageing barrel that is lost to evaporation.

A distillers' term for maturation losses. In Scotland, some two per cent of all maturing whisky evaporates through the porous oak casks each year, but in hotter and more humid climates the losses may be much greater. glossary B

A certain amount of whisky stored in barrels evaporates through the wood: this is known as the angel's share. Roughly 2% of each barrel is lost this way each year, most of which is alcohol.

Angel's share is a winemaking term for the portion (share) of a wine's volume that is lost to evaporation. This phenomenon occurs during aging in oak barrels, typically French or American oak, or after distillation. In low humidity conditions the loss to evaporation may be primarily water.