The Olive Oil Glossary

Essential Extra Virgin Olive Oil Terms Explained

From EVOO and acidity to polyphenols, cold extraction and harvest dates, understanding olive oil terminology can help you recognize quality, interpret labels, and choose the right oil for your kitchen.
Here are the essential terms every olive oil lover should know.

acidity (noun)

The amount of free fatty acids in olive oil, expressed as a percentage of oleic acid.

For Extra Virgin Olive Oil, free acidity must not exceed 0.8%.
Lower acidity can be associated with careful fruit handling and production, but acidity alone does not determine olive oil quality. Sensory characteristics and other chemical parameters also matter.

bitterness (noun)

One of the positive sensory characteristics of Extra Virgin Olive Oil.

Bitterness is commonly associated with naturally occurring phenolic compounds and is often more noticeable in oils made from greener, earlier-harvest olives. A pleasant level of bitterness is not a defect.

brine (noun)

A saltwater solution used to cure and preserve table olives.

Brine influences the olives’ flavor, texture, salt level, and fermentation process. Some GAEA olive snacks are instead packed without brine for convenient snacking.

cold-extracted (adjective)

A term describing olive oil obtained through modern mechanical extraction at controlled low temperatures.

Under European labeling rules, “cold extraction” may be used for virgin or Extra Virgin Olive Oil extracted below 27°C by centrifugation or percolation. Cold extraction helps preserve desirable aromas and sensory characteristics.

cold-pressed (adjective)

A traditional term referring to olive oil produced using mechanical presses.

Modern olive mills generally use centrifugation rather than hydraulic pressing, which is why “cold-extracted” is usually the more technically accurate term today.

cultivar (noun)

A specific cultivated variety of olive.

Examples include Koroneiki, Athinolia, Picual, and Arbequina. Different cultivars can produce dramatically different aromas, flavors, yields, and chemical profiles.

defect (noun)

An undesirable sensory characteristic detected in olive oil.

Examples include rancid, musty, fusty, winey-vinegary, or muddy-sediment notes. To qualify as Extra Virgin Olive Oil, an oil must have no sensory defects and must demonstrate positive fruitiness.

early harvest (noun/adjective)

Olives harvested earlier in the season, typically while they are still green or beginning to ripen.

Early-harvest oils often have greener aromas, more pronounced bitterness and pungency, and can contain higher concentrations of certain phenolic compounds. They also generally produce less oil per kilogram of olives than later-harvest fruit.

Extra Virgin Olive Oil (EVOO) (noun)

The highest grade of virgin olive oil. EVOO is obtained from olives solely through mechanical or physical processes without refining. Under U.S. standards, Extra Virgin Olive Oil must have:

  • Free acidity no higher than 0.8%

  • No sensory defects

  • Detectable fruitiness

  • Compliance with additional chemical quality and purity standards

“Extra Virgin” refers to a defined quality classification — not simply a marketing term.

filtered olive oil (noun)

Olive oil from which suspended water, olive particles, and sediment have been removed through filtration. Filtering can improve clarity and help maintain stability during storage.

first cold press (noun)

A traditional olive oil term referring to the first mechanical pressing of olive paste at low temperature.

Modern olive mills generally use centrifugation rather than presses, so the term is less technically relevant to contemporary production. Under European rules, “first cold pressing” has a specific regulated meaning.

fruitiness (noun)

A positive sensory attribute characteristic of olive oil made from healthy, fresh olives.

Fruitiness can evoke aromas such as:

  • Fresh-cut grass

  • Green olive

  • Artichoke

  • Tomato leaf

  • Herbs

  • Almond

  • Apple

  • Ripe fruit

Extra Virgin Olive Oil must demonstrate positive fruitiness.

harvest date (noun)

The date or season when the olives used to make the oil were harvested. Unlike wine, olive oil generally does not improve with age.  A harvest date can therefore provide useful information about an oil’s freshness and production season.

high-polyphenol olive oil (noun)

An olive oil containing relatively high concentrations of naturally occurring phenolic compounds. Polyphenol levels vary according to olive variety, ripeness, climate, harvest timing, extraction, storage, and age.

Polyphenol-rich oils often have more noticeable bitterness and peppery pungency.

K232 / K270 (noun)

Ultraviolet absorbance measurements used in olive oil analysis. They help assess oxidation and certain changes that may occur during processing or storage. They are part of the broader set of laboratory parameters used to evaluate olive oil quality and authenticity.

Koroneiki (noun)

One of Greece’s most important olive cultivars for olive oil production.

Koroneiki olives are small and prized for producing aromatic Extra Virgin Olive Oils that can display fruity, grassy, herbal, bitter, and peppery characteristics. The variety is widely cultivated throughout Greece.

lampante virgin olive oil (noun)

Virgin olive oil that does not meet the requirements for direct consumption because of its chemical and/or sensory characteristics. Lampante oil must undergo refining before it can become part of an edible refined olive oil product. It is not Extra Virgin Olive Oil.

malaxation (noun)

The controlled mixing of crushed olive paste before oil separation. Malaxation allows small oil droplets to combine into larger droplets that can be separated more efficiently.

Time and temperature during this stage can influence yield, aroma, flavor, and phenolic composition.

monovarietal / single-varietal (adjective)

Olive oil produced from one olive cultivar rather than a blend of several varieties.

For example, an oil produced exclusively from Koroneiki olives can be described as monovarietal or single-varietal.

olive oil (noun)

A broad term for oils obtained from olives. In U.S. grade terminology, a product labeled simply “Olive Oil” consists of refined olive oil blended with virgin olive oils suitable for consumption.

This differs from Extra Virgin Olive Oil, which is unrefined virgin olive oil meeting stricter chemical and sensory standards.

olive-pomace oil (noun)

Oil produced from olive pomace — the solid material remaining after the initial extraction of virgin olive oil.

Crude olive-pomace oil requires refining before consumption. Commercial olive-pomace oil is a separate category from virgin and Extra Virgin Olive Oil.

oxidation (noun)

A chemical process that occurs when olive oil reacts with oxygen. Over time, oxidation causes fresh aromas and flavors to decline and can eventually create rancid characteristics. Light, heat, oxygen, and time can accelerate quality deterioration.

PDO — Protected Designation of Origin (noun)

A European geographic designation identifying a product with a particularly strong connection to a defined region. For a PDO product, the relevant production, processing, and preparation stages must take place within the specified geographical area according to an approved product specification.

Examples in Greek olive oil include Kalamata PDO and Sitia PDO.

peroxide value (noun)

A chemical measurement used to assess primary oxidation in oils. Peroxide value is one of several analytical parameters used when evaluating olive oil quality. A single measurement should always be interpreted alongside the other required quality indicators.

PGI — Protected Geographical Indication (noun)

A European geographic designation indicating a recognized connection between a product and a particular region. At least one defined stage of production, processing, or preparation must take place in that geographical area.

An example is Chania PGI olive oil from Crete.

polyphenols (noun)

A broad group of naturally occurring compounds found in olives and Extra Virgin Olive Oil. They contribute to olive oil’s:

  • Bitterness

  • Pungency

  • Oxidative stability

  • Sensory character

Their concentration varies widely between oils and generally decreases over time.

pungency (noun)

The peppery or prickling sensation often felt in the throat when tasting fresh Extra Virgin Olive Oil. Pungency is a positive sensory attribute, particularly common in fresh and early-harvest oils. Its intensity can be influenced by olive variety and phenolic composition.

rancidity (noun)

An undesirable aroma and flavor caused primarily by oxidation. Rancid olive oil may smell or taste stale, waxy, paint-like, or reminiscent of old nuts. Rancidity is considered a sensory defect.

refined olive oil (noun)

Olive oil obtained by refining virgin olive oils that require further processing before consumption. Refining removes undesirable sensory characteristics and creates a relatively neutral oil. Under U.S. standards, products sold as “Olive Oil” generally combine refined olive oil with some virgin olive oil.

regenerative farming (noun)

An approach to agriculture focused on improving the health and resilience of the farming ecosystem. Practices can include:

  • Maintaining ground cover

  • Improving soil health

  • Supporting biodiversity

  • Reducing soil disturbance

  • More efficient use of natural resources

Specific regenerative practices vary by farm, climate, and agricultural system.

sensory evaluation (noun)

The structured assessment of olive oil through smell and taste. Trained tasters evaluate positive attributes such as fruitiness, bitterness, and pungency, while also checking for defects. Sensory evaluation works alongside laboratory analysis when determining Extra Virgin Olive Oil quality.

sensory profile (noun)

The overall combination of aroma, flavor, bitterness, pungency, intensity, and other sensory characteristics that define an olive oil. Examples might include:

grassy, fruity, artichoke, almond, herbal, mild, bitter, or peppery.

single-estate olive oil (noun)

Olive oil produced from olives originating from one defined estate or farm. Single-estate production can provide greater specificity regarding origin, cultivars, farming practices, and terroir.

table olive (noun)

An olive prepared specifically for eating rather than oil extraction. Because freshly harvested olives are naturally bitter, table olives typically undergo curing or fermentation before consumption.

Common Greek table olives include Kalamata and Chalkidiki olives.

terroir (noun)

The combination of environmental factors associated with where an agricultural product is grown. For olive oil, terroir can include:

  • Soil

  • Altitude

  • Climate

  • Rainfall

  • Sun exposure

  • Landscape

Together with cultivar and farming practices, these factors can influence an olive oil’s character.

unfiltered olive oil (noun)

Olive oil that has not undergone full filtration after extraction. It may retain microscopic olive particles and water droplets, giving it a cloudy appearance.

Unfiltered does not automatically mean higher quality, and suspended material can affect stability during storage.

varietal (noun/adjective)

A term referring to the olive variety or cultivar used to make an olive oil. Examples include Koroneiki, Athinolia, Picual, and Arbequina. For greater technical precision, “cultivar” is often the preferred term.

Speak Olive Oil Like a Connoisseur

Understanding Extra Virgin Olive Oil is easier when you know what the terminology actually means.

From acidity and harvest date to cultivar, polyphenols, sensory evaluation, and geographic origin, each term provides another clue to how an olive oil was grown, produced, tested, and protected.

The more you understand the language of olive oil, the easier it becomes to recognize quality — and to choose an EVOO that matches your taste.