- 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.
- Roman silver coins originally valued at ten asses, later debased in value and purity; in use from the late 3rd century BCE until the mid-3rd century CE.
- Refers to the period in history and style of art that developed when Rome was ruled by the Republic, from its founding in 509 BCE through the Battle of Actium in 31 BCE or the formal establishment of the Empire in 27 BCE. Art produced during this period reflects the political power, glories, and distinguished ancestors of the ruling families, resulting in many portraits and historical reliefs. The style is characterized by the influence of Classical Greek art and an emphasis on extreme realism.
- 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.