Cicerone Beer Server key terms

A beer brewed with top-fermenting yeast at warm temperatures, so fermentation is fast and often fruity and complex. Ales include pale ale, stout, porter, and wheat beer.

A beer brewed with bottom-fermenting yeast at cold temperatures and then stored cold for weeks. Lagers usually taste crisp and clean, and include pilsner, bock, and pale lager.

Yeast that rises to the surface of the fermenter and works best in warm conditions, roughly 15-24 C (60-75 F). It creates the fruity aromas associated with ales.

Yeast that sinks to the bottom of the fermenter and ferments best in cold conditions, roughly 7-13 C (45-55 F). It gives the clean, crisp character typical of lagers.

Grain, usually barley, that has been steeped, sprouted, and kiln-dried. Malt supplies most of the sugar that becomes alcohol and contributes color plus bready, toasty, or caramel flavors.

The cone-like flower of a climbing plant, added to beer for bitterness, aroma, flavor, and preservation. Varieties range from citrusy and floral to earthy, spicy, or resinous.

International Bitterness Units, a laboratory measure of the hop-derived bitter compounds in beer. Higher numbers mean more bitterness; a light lager may be 10-20 IBU while an IPA can be 40-70.

Alcohol by volume, the percentage of a beer's volume that is pure alcohol. It is calculated from the drop in density during fermentation and is used to label beer strength.

An aromatic compound made by yeast during fermentation that smells fruity, such as banana, pear, apple, or cherry. Esters are common in warm-fermented ales and in German wheat beers.

An aromatic compound from yeast or brewing ingredients that smells spicy, clove-like, smoky, or medicinal. The clove note in wheat beer comes from yeast-produced phenols.

A compound tasting of butter or butterscotch that yeast normally reabsorbs before fermentation ends. In finished beer it points to a rushed fermentation, weak yeast, or dirty dispense equipment.

The weight and fullness a beer leaves on the tongue, from thin and watery to thick and creamy. Body comes mainly from leftover sugars, proteins, and alcohol rather than from flavor alone.

How malt sweetness, hop bitterness, alcohol warmth, and acidity sit against each other in a beer. A balanced beer has no single element drowning out the rest.

The flavors and sensations that linger after a beer is swallowed, including length, bitterness, warmth, and dryness. Calling a finish short, long, dry, or sweet helps compare styles.

A pale golden lager that began in the Czech city of Plzen, known for soft water, a crisp dry finish, and clear hop bitterness and aroma. German versions are drier and more bitter.

A dark ale brewed with roasted barley or heavily roasted malt, giving coffee, chocolate, and sometimes burnt notes. Styles run from dry Irish stout to sweet and strong imperial versions.

India Pale Ale, a hop-focused ale with strong bitterness and hop aroma, usually pale to amber in color. Modern examples range from hazy and juicy to very bitter and resinous.

A German wheat ale, unfiltered and often refermented in the bottle, with at least half wheat in the grain bill. Yeast gives banana and clove notes and the beer pours hazy with a thick head.

A glass with no grease, soap film, lint, or dried residue, so foam clings to the sides and aroma is not distorted. Wetting the glass and checking for even foam confirms it.

A glass with a laser-etched or scratched pattern on the inside bottom that releases carbon dioxide steadily, keeping a head alive and sending up a stream of bubbles.

The cap of foam on a poured beer, formed when proteins and hop acids trap carbon dioxide. Most styles are served with roughly two fingers of head to carry aroma.

A draft pouring method where the glass is held at about 45 degrees and beer runs down the inside wall, then the glass is straightened to build the head.

The fitting that locks onto a keg valve and connects it to the gas and beer lines. Couplers are style-specific, with the D-type (Sankey) being the most common.

Foam-on-beer, a chamber installed on a draft line that catches foam when a keg empties and stops flow, so lines stay full of beer instead of gas.

The gas pressure, usually carbon dioxide or a carbon dioxide and nitrogen blend, applied to a keg to push beer through the lines while holding the intended carbonation level.

The temperature at which beer is poured for the guest. Most ales show best around 7-13 C (45-55 F) and lagers colder, with very cold service muting aroma and flavor.

The form of the glass, chosen to support a style: a tall flute for pale lager, a tulip for aromatic ales, a vase for wheat beer, a snifter for strong sipping beers.

Pouring bottled beer steadily down the side of a tilted glass, then stopping or swirling so yeast sediment stays in the bottle when the beer is bottle-conditioned.

A fault where ultraviolet or blue light breaks down hop compounds into a sulfurous, skunky-smelling substance. Brown glass, cans, and dark storage prevent it.

Staling caused by oxygen reacting with beer compounds, producing papery, cardboard, sherry, or honey-like flavors along with darker color and fading hop freshness.

Oxygen already present in beer or picked up during transfers and packaging. Even small amounts speed staling, so brewers and servers avoid splashing and unnecessary air contact.

Keeping beer cold from brewery to warehouse to bar. Warm storage accelerates staling and can over-carbonate packages, and repeated temperature swings do more harm than steady cold.

A date on the package showing the brewer's recommended window for best flavor. It may appear as best-by, packaged-on, or a coded date, so staff must know how to read it.

The gas-filled gap above beer inside a keg or tank. Keeping that space filled with carbon dioxide keeps air away from the beer and protects aroma and freshness.

Flushing draft lines with cleaning solution and rinsing on a set schedule, often every two weeks, to remove yeast, bacteria, and beerstone that cause off-flavors and foamy pours.

A stock rotation rule that sells the oldest packaged beer before newer deliveries, so nothing sits in storage past its freshness date.

Cleaning and sanitizing taps, faucets, couplers, and glassware to remove microbes and residue. Poor sanitation brings sour, buttery, or musty flavors and shortens shelf life.

Amber or brown bottles that block most ultraviolet and blue light, protecting hop compounds from turning skunky. Clear and green bottles offer little protection and need dark storage.