- Kingdom containing multicellular organisms having cells bound by a plasma membrane and organized into tissue and specialized tissue systems that permit them to either move about in search of food or to draw food toward themselves. Unable to make their own food within themselves, as photosynthetic plants do, they rely on consuming preformed food. They possess a nervous system with sensory and motor nerves, enabling them to receive environmental stimuli and to respond with specialized movements.
- Refers to an ancient Greek style and period that begins around 480 BCE, when the Greek city-states defeated the Persian invaders, and ends around 323 BCE, with the death of Alexander the Great. It is characterized by the rebuilding of cities after the Persian wars, the flourishing of philosophy, drama, architecture, sculpture, painting, and the other arts. In the visual arts, it is known for the mastery of the human form and sophistication of architectural design.
- General term referring to smaller members of the family Columbidae; larger members are called "pigeons." The white dove is the symbol of peace.
- Small, silver Greek coins originally equivalent to six obols and issued from the 6th century BCE; usage continued by the Parthians and Sassanians until the 7th century CE.
- Pure metallic element having symbol Ag and atomic number 47; a malleable, ductile, white metal with characteristic sheen, considered a precious metal. Silver is widely distributed throughout the world, occurring rarely as metallic silver (in Peru, Norway) but more often as silver-gold alloys and silver ore. Today silver is obtained as a byproduct in the refinement of gold, lead, copper, or zinc ores. Silver was smelted from the ore galena as early as 3800 BCE. As a pure metal, silver is second to gold in malleability and ductility, can be polished to a highly reflective surface, and used -- typically in an alloy -- in jewelry, coinage, photography, mirrors, electrical contacts, and tableware.
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