- Refers to a broad range of alloys of copper, specifically any non-ferrous alloy of copper, tin, and zinc or other trace metals. Bronze was made before 3,000 BCE -- possibly as early as 10,000 BCE, although its common use in tools and decorative items is dated only in later artifacts. The proportions of copper and tin vary widely, from 70 to 95 percent copper in surviving ancient artifacts. Because of the copper base, bronze may be very malleable and easy to work. By the Middle Ages in Europe, it was recognized that using the metals in certain proportions could yield specific properties. Some modern bronzes contain no tin at all, substituting other metals such as aluminum, manganese, and even zinc. Historically, the term was used interchangeably with "latten." U.S. standard bronze is composed of 90% copper, 7% tin and 3% zinc. Ancient bronze alloys sometimes contained up to 14% tin.
- Pieces of metal stamped by government authority for use as money.
- Referring to the sex that normally produces eggs or female germ cells.
- Refers to the ancient Greek period, culture, and art of ancient Greece that lasted from about 330 BCE to 31 BCE, when Augustus defeated Cleopatra and Mark Antony. It is characterized by an international culture that was ushered in by Alexander the Great's conquest of India, Egypt, and the Near East. In architecture and art, the style is marked by greater sophistication, complexity, and diversity than was known in earlier Greek styles. Architecture diverges from strict rules of earlier periods. Sculptors emphasized more realistic figures in a greater variety of poses than in earlier Greek art.
- Any of various forms of protective coverings for the head, usually made of a hard material, including the outside steel layer of helmets that consist of inner and outer parts.