A ABV Alcohol by volume. The alcoholic strength measured as the percentage of alcohol present. ACE'd A term coined by Bruichladdich, meaning Cask Finish. It is an acronym for Additional Cask Enhancement. (See Cask Finish). Aftershots (see Feints) Age The age of a whisky is determined by the length of time the youngest spirit in the blend has spent in oak casks. Whisky is not believed to age in the bottle. Ageing (see Maturation) American Oak Also known as White Oak or by the binomen Quercus Alba, American oak is widely used in whisk(e)y cooperage. American Oak has a high vanillin content. It is also fast growing and possesses high content of lactones. Amylase An enzyme used in a mash tun to convert the starch into maltose. Angel's Share (also 'Part des anges') As the whisky ages a small percentage of alcohol evaporates, thus lowering the spirit's abv. In Scotland this accounts for a loss of approximately 2% per annum, though the angels' greed is heightened in warmer climes and this rate can increase; in India the angel's share can account for a loss of as much as 12% abv per annum. Aunteron A doppelganger with the capability to supplant a person, often malevolent.