Arcturus

Part of speech: noun

Definitions

1. The brightest star visible in the northern night sky, located in the constellation Boötes and notable for its orange hue
2. A prominent orange-tinted star found in the Boötes constellation, ranking among the most luminous stars observable from Earth
3. The most brilliant star in Boötes, distinguished by its warm color and significant brightness as seen from our planet

Etymology: Arcturus is the name of a bright star in the constellation Boötes, and its name is a Greek compound meaning "bear-guard." The Greek word "arktos" meant "bear," and "ouros" meant "guardian" or "watcher." The star sits near the tail of the Great Bear, so the ancient Greeks imagined it as the guardian following the bear around the northern sky. The name passed into Latin as "Arctūrus," and English later borrowed it from that Latin form. The Greek compound itself was "Arktouros," which combined the same two elements, so the name has kept its basic meaning across three languages. Ancient astronomers knew the star well, and its name shows the sky being read as a set of animals and their keepers.