Coffee blooming is the initial, rapid release of trapped carbon dioxide gas ,Co2 that occurs when hot water first touches fresh coffee grounds, causing them to bubble and expand. It typically lasts 30–45 seconds and acts as a "pre-wetting" step, ensuring even water distribution for a more balanced, flavorful brew while avoiding a sour or weak taste

Burr coffee grinders use two revolving, abrasive surfaces (burrs) to crush coffee beans into a consistent, uniform size rather than chopping them like blade grinders. They provide precise control over grind size, leading to better extraction and improved coffee flavor, making them ideal for espresso and, pour-over, and, French press

The Chemex is a glass, hourglass-shaped pour-over coffee maker invented in 1941 by chemist Peter Schlumbohm. It uses specialized, thick paper filters to produce a very clean, light-bodied, and sediment-free cup of coffee, often highlighting delicate flavor notes better than other brewing methods

Coffee coarseness refers to the particle size of ground coffee beans, ranging from large, chunky, sea-salt-like pieces (coarse) to tiny, powdery particles (fine).

Cold brew is coffee made by steeping coarsely ground beans in room-temperature or cold water for an extended period, typically 12 to 24 hours. Unlike hot-brewed coffee, this slow, low-temperature extraction creates a concentrated, smooth beverage that is 50–67% less acidic, with a naturally sweeter, less bitter flavor

The golden, creamy layer that forms on top of a freshly pulled espresso shot, made from emulsified oils and CO2.

The phrase “to dial in” is used to describe the process of making espresso taste as delicious as possible. Essentially, you are looking to extract the right amount of soluble flavour from the coffee using the right amount of water.

A concentrated coffee beverage brewed by forcing hot water through finely-ground coffee under high pressure.

Coffee extraction is the process of using hot water to dissolve and draw out soluble flavors, oils, and aromatic compounds from ground coffee beans. It determines the balance of acidity, sweetness, and bitterness, with an ideal yield typically being 18–22% of the grounds, producing a balanced cup

A style of brewing where ground coffee is completely immersed in water and steeped until the desired extraction is achieved. Common immersion brew methods include cupping, French press, Aeropress, and Syphon. This is also how tea is most commonly brewed.

A knock box (or coffee knock box) is a durable container with a padded, horizontal bar used by baristas to remove used coffee grounds ("pucks") from an espresso portafilter. It streamlines cleanup, protects the portafilter from damage caused by hitting hard trash cans, and keeps coffee stations tidy.

The technique of pouring steamed milk into espresso to create visually appealing patterns or designs on the surface.

A portafilter is the handheld, handled component of an espresso machine that holds ground coffee during brewing. It consists of a metal basket, a handle, and a body that locks into the machine’s group head, where pressurized hot water forces through the grounds to create espresso

The part of the espresso machine that dispenses steam to heat and froth milk.

Tamping is the process of compressing ground coffee into a compact, even "puck" inside an espresso machine's portafilter basket using a handheld tool called a tamper. It removes air pockets and creates consistent resistance, ensuring water flows evenly through the coffee, resulting in a balanced, rich extraction and preventing watery, under-extracted shots

A V60 filter is a cone-shaped, single-use paper filter designed specifically for the Hario V60 pour-over coffee dripper. These filters have a 60-degree angled cone shape, which forces water to flow through the center of the coffee bed, allowing for optimal extraction of bright, fruity, and complex flavors in a clean, sediment-free cup.