Reference · 22 terms
Homebrewing Glossary
Understand 22 essential homebrewing terms covering ingredients, fermentation, gravity, bitterness, color, water chemistry and brewing history.
A
Alpha acid
Also called: alpha acids
A hop compound that provides bittering potential.
Alpha acids from hops isomerize during heating and contribute much of beer’s measured bitterness.
Sources: How to Brew
Apparent attenuation
Also called: attenuation
The relative gravity drop from the start to the end of fermentation.
Apparent attenuation estimates how much wort extract the yeast consumed. Yeast strain, mash profile, wort composition and fermentation conditions affect it.
Sources: How to Brew
B
Bappir
Also called: beer bread
A Mesopotamian grain preparation associated with ancient brewing descriptions.
Bappir is often described as a bread or cereal preparation in reconstructions of Mesopotamian brewing. It illustrates how ancient methods differed from modern mashing.
Sources: A hymn to Ninkasi, A History of Beer and Brewing
C
Calcium
Also called: Ca, Ca2+
A major brewing-water ion that supports pH control, clarification and fermentation.
Calcium can help lower mash pH, support enzyme reactions and encourage flocculation. Brewers often adjust it with gypsum or calcium chloride.
Sources: Bru'n Water Knowledge
Cervoise
Also called: ancient ale
A historical grain-based fermented drink associated with unhopped or lightly hopped European beer.
Cervoise broadly describes cereal fermentations from before hops dominated European beer. The term distinguishes older practices from standardized modern brewing.
Sources: A History of Beer and Brewing
Chloride
Also called: Cl
A water ion that can support fullness and malt expression.
Chloride can enhance body, roundness and malt sweetness. Balance it with sulfate and keep total mineral concentrations appropriate.
Sources: Bru'n Water Knowledge
E
EBC
Also called: European Brewery Convention
The European scale used to describe malt and beer color.
EBC is widely used in Europe for color. A common finished-beer approximation is EBC equals SRM multiplied by about 1.97.
Sources: How to Brew
F
Fermentation
Also called: primary fermentation
The conversion of wort sugars into alcohol, carbon dioxide and flavor compounds by yeast.
Fermentation converts fermentable sugars and builds much of the beer’s final profile. Temperature, yeast health, initial oxygen and nutrients influence the result.
Sources: How to Brew
Final gravity
Also called: FG
The gravity measured when fermentation has finished and stabilized.
Final gravity reflects the extract remaining after fermentation. Combined with OG, it helps estimate apparent attenuation and alcohol content.
Sources: How to Brew
G
Gruit
Also called: grut, herb mixture
A blend of herbs used before or alongside hops to season and balance beer.
Gruit composition varied by region, production rights and local practice. It shows that beer bitterness and aroma were not always dominated by hops.
Sources: A History of Beer and Brewing
H
Hops
Also called: hop cones
The flowers used to add bitterness, flavor and aroma to beer.
Hops provide alpha acids, aromatic oils and polyphenols. Their effect depends on variety, crop, storage, amount and addition timing.
Sources: How to Brew
I
IBU
Also called: International Bitterness Units
A recipe estimate of beer bitterness.
IBU estimates the concentration of bitter compounds, mainly those produced from hops during the boil. It helps compare recipes but does not fully predict perceived bitterness.
Sources: How to Brew
L
Lager
Also called: bottom-fermented beer
A beer family associated with cooler fermentation and extended cold conditioning.
Lagers generally ferment and condition cooler than classic ales. Their development is tied to yeast selection, refrigeration, maturation and technical stability.
Sources: A History of Beer and Brewing, BJCP Beer Style Guidelines
M
Malt
Also called: malted grain
Germinated and kilned grain that provides starch, enzymes, color and flavor.
Malt is the fermentable foundation of many beers. During mashing, its enzymes convert starch into sugars that yeast can use.
Sources: How to Brew
Mash
Also called: mashing
The stage where crushed grain and hot water convert starch into sugars.
Mashing activates malt enzymes within controlled temperature and pH ranges. It influences fermentability, body, efficiency and final character.
Sources: How to Brew
O
Original gravity
Also called: OG
The specific gravity of wort before fermentation.
Original gravity estimates the extract available before fermentation. It helps predict alcohol potential and compare the brewed wort with the recipe target.
Sources: How to Brew
P
pH
Also called: potential of hydrogen
A measure of how acidic or basic a liquid is.
In brewing, pH affects enzyme activity, extraction, fermentation and flavor stability. Mash pH is an important process reference.
Sources: Bru'n Water Knowledge
R
Reinheitsgebot
Also called: 1516 Bavarian regulation, German Beer Purity Law
A 1516 Bavarian regulation commonly associated with beer ingredients.
The Reinheitsgebot is often presented as a purity law, but it also belongs to a context of grain supply, prices, taxation and market control. It was not a universal beer recipe.
Sources: April 23, 1516: Bavaria Cracks Down on Beer Brewers, A History of Beer and Brewing
S
SRM
Also called: Standard Reference Method
The American scale used to describe beer color.
SRM expresses finished beer color using a standardized method. Homebrewers often estimate it from the grain bill with formulas such as Morey.
Sources: How to Brew
Sulfate
Also called: SO4, SO4 2-
A water ion that can sharpen dryness and hop bitterness.
Sulfate can make bitterness seem drier and more defined, especially in hop-forward beer. Evaluate it alongside chloride and absolute concentrations.
Sources: Bru'n Water Knowledge
W
Water profile
Also called: mineral profile
The mineral composition of brewing water.
A water profile summarizes major ions such as calcium, sulfate, chloride, sodium, magnesium and bicarbonate.
Sources: Bru'n Water Knowledge
Wort
The sweet liquid produced from malt before fermentation.
Wort contains sugars, proteins, minerals and flavor compounds extracted from malt. Yeast fermentation turns it into beer.
Sources: How to Brew