- Refers to art styles that were a reaction against the traditional European conception of art as the imitation of nature. In the strictest sense, the term refers to 20th-century Western painting, sculpture, or graphic art having subject matter that does not include forms that represent objects from the visible world. For the general concept of art in which natural forms are only simplified or changed in their representation, but not eliminated entirely, use "abstract (general art genre)." For the process of formulating general concepts by abstracting common properties of instances, use "abstraction."
- Refers to the context of or associated specifically with the modern political entity of the United States of America.
- Intaglio process in which the design is worked into an acid-resistant substance coating the metal printing plate; the plate is then exposed to acid, which etches the plate where the metal is exposed, to create lines and dark areas. For the single step of exposing the plate to acid, use "biting."
- General term referring to animals from several evolutionary lines and thus not properly a taxonomic group. The term refers to aquatic animals found in the fresh and salt waters all over the world, characterized by being cold-blooded, living and breathing primarily in the water throughout their lives, possessing gill slits, a notochord or skeletal supporting rod, a dorsal hollow nerve cord, a tail, scales covering the body, and two sets of paired fins and several unpaired fins. Living species range from the primitive jawless lampreys and hagfishes through the jawed fishes with cartilaginous skeletons such as sharks, skates, and rays to the abundant and diverse bony fishes.
- A liquid made up of molecules of hydrogen and oxygen (HO2). When pure, it is colorless, tasteless, and odorless. It exists in gaseous, liquid, and solid forms; it is liquid at room temperature. It is the liquid of which seas, lakes, and rivers are composed, and which falls as rain. Water is one of the most plentiful and essential of compounds. It is vital to life, participating in virtually every process that occurs in plants and animals. One of its most important properties is its ability to dissolve many other substances. The versatility of water as a solvent is essential to living organisms. The term "water" is typically used to refer to the liquid form of this compound; for the solid or gaseous forms, use "ice" or "water vapor."
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Dimensions: 9.875 x 7.938 in. (25.083 x 20.161 cm)
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