Art Glossary
A comprehensive glossary of art terms, techniques, movements, and materials. From chiaroscuro to creative coding, find clear definitions for every art concept.
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Cadmium Colors: The Vibrant Pigments That Revolutionized the 19th Century Palette
Cadmium pigments produce the most vibrant yellows, oranges, and reds in painting. Learn their history from 1818 to today, why they degrade, and how artists from Van Gogh to Pollock used them.
Condition Report: Documenting the Physical State of Artworks
A condition report is a documented assessment of an artwork's physical state. From museum loans to insurance claims, learn what condition reports contain and why they matter.
Conservator (Restorer): The Professionals Who Keep Art Alive
A conservator preserves and repairs artworks using science and craft. From Renaissance restorers to nanotechnology, learn how these professionals save paintings, sculptures, and more.
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Fat Over Lean: The Oil Painting Rule for Layering to Prevent Cracking
Fat over lean is the oil painting rule that each layer should contain more oil than the one beneath. Learn the science behind why it prevents cracking and delamination.
Fixative: The Spray That Keeps Drawings From Smudging
Fixative is a spray applied over charcoal, pastel, and pencil drawings to prevent smudging. From Loriot's 18th-century secret to modern acrylic sprays, learn its history.
Fugitive Color: The Pigments That Fade and Disappear Over Time
Fugitive color is pigment that fades over time when exposed to light. From Van Gogh's geranium lake to cochineal reds, learn why some pigments vanish and how conservators fight back.
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Lead White: The Toxic Pigment That Dominated Painting for 2,000 Years
Lead white was the most important white pigment in European painting for two millennia. Learn its history, why it was so valued, and how its toxicity led to its replacement.
Lightfastness: Why Some Pigments Survive Centuries and Others Vanish in Months
Lightfastness measures how well a pigment resists fading under light. Learn how the Blue Wool scale, ASTM ratings, and microfade testing protect art from irreversible color loss.
Linseed Oil: The Binder That Made Oil Painting Possible
Linseed oil is the drying oil that binds pigment in oil paint. From Van Eyck to Rembrandt to modern conservation science, learn how it works and why it matters.
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Marouflage: Adhering Painted Canvas to Walls and Ceilings
Marouflage is the technique of adhering a painted canvas to a wall or ceiling using adhesive. From Renaissance murals to modern conservation, learn how it works.
Museum: The Institution That Collects, Preserves, and Exhibits Art
A museum is a not-for-profit institution that collects, preserves, and exhibits art. From the Louvre to the Met, learn how museums shape what art survives.
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Patina: Surface Color and Texture on Metal from Age or Treatment
Patina is the surface color and texture that forms on metal through age, oxidation, or chemical treatment. Learn how sculptors from Cellini to Moore used it intentionally.
Pentimento: Visible Traces of a Changed Composition Beneath the Surface
A pentimento is a visible trace of a changed composition beneath a painting's surface. Learn how X-ray and infrared imaging reveal artists' revisions from Rubens to Ensor.
Plaster: The Casting and Modeling Material That Shaped Sculpture History
Plaster is calcium sulfate used for casting sculpture and making molds since ancient Egypt. From death masks to Renaissance reliefs to Rodin's models, plaster is sculpture's most versatile intermediate.
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Sizing: The Sealant Layer That Protects Canvas and Paper From Oil
Sizing is the sealant applied to canvas or paper before gesso or ground to prevent oil penetration. Learn the history of rabbit skin glue sizing and why PVA size replaced it.
Support: The Physical Surface Every Painting Is Made On
The support is the physical surface a painting is made on, from wood panels to canvas to copper. Learn its history, types, and why it matters for conservation.
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Titanium White: The Modern Pigment That Replaced Lead
Titanium white is the most opaque white pigment ever made, replacing lead white in the 20th century. Learn its history, how it changed painting, and why it matters for dating art.
Turpentine: The Painter's Solvent From Pine Resin to Modern Alternatives
Turpentine is the traditional solvent distilled from pine resin, used to thin oil paint and clean brushes. From Old Masters to modern safer alternatives, learn its history.
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Varnish: The Protective Coating That Defines a Painting's Surface
Varnish is the transparent coating applied over finished paintings to protect and saturate the surface. From mastic to dammar to synthetic resins, learn its history.
Vermilion: The Brilliant, Toxic Red From Cinnabar
Vermilion is the brilliant red pigment made from cinnabar, a mercury ore mined for 9,000 years. Learn its history, toxicity, and how artists from Pompeii to Rothko used it.
Why an Art Glossary?
Art has always had a language problem. Walk into any gallery and you will hear terms like chiaroscuro, impasto, sfumato, and pentimento thrown around as if everyone knows what they mean. Most people do not. They nod along, afraid to ask, and miss half of what the painting is actually doing.
This glossary exists to fix that. Every entry is written in plain English with real examples: specific paintings, specific artists, specific dates. When we explain plein air, we point you to Monet working beside the Seine in 1873, not a generic definition copied from a dictionary. When we cover creative coding, we start with Casey Reas and Ben Fry at MIT in 2001, not a vague paragraph about "art and technology."
The terms here span centuries and disciplines. You will find Renaissance techniques sitting next to digital art movements, printmaking terminology next to motion graphics concepts. That mix is intentional. Art does not stay in neat historical boxes, and neither does the vocabulary we use to talk about it. A painter working today might need to understand glazing just as much as a 3D animator needs to know what kinetic typography means.
Each definition is a starting point, not a finish line. We write them to be specific enough that you can recognize the technique the next time you see it, but short enough that you can read one in under five minutes. If a term leads you to a painting you had not considered before, or sends you down a rabbit hole about a movement you had never heard of, the glossary is doing its job.
New terms are added regularly. If there is a concept you keep running into but cannot find here, that is a gap we want to fill. The best art terminology does not stay still. It grows as artists invent new ways of working, and the language has to keep up.