- An amorphous, inorganic substance made by fusing silica (silicon dioxide) with a basic oxide; generally transparent but often translucent or opaque. Its characteristic properties are its hardness and rigidity at ordinary temperatures, its capacity for plastic working at elevated temperatures, and its resistance to weathering and to most chemicals except hydrofluoric acid. Used for both utilitarian and decorative purposes, it can be formed into various shapes, colored or decorated. Glass originated as a glaze in Mesopotamia in about 3500 BCE and the first objects made wholly of glass date to about 2500 BCE.
- Use especially to describe images painted manually, to distinguish them from images transferred mechanically, as on pottery, textiles, and other objects. For the manual adding of color to an existing image, use "hand coloring."
- Vessels, generally of ceramic, glass, metal, or plastic, that have a wide mouth with a broad lip and usually a handle at one side, but sometimes having two ears; includes those accompanied by a washbowl and used for personal hygiene.
- Shallow, usually circular dishes from which food is eaten.
- Drinking vessels without a stem, foot, or handle and traditionally having a rounded bottom; also includes similar forms with heavy, flattened bottoms.
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