Arcus senilis
- Arcus senilis is an old age syndrome where there is a white, grey, or blue opaque ring in the corneal margin (peripheral corneal opacity), or white ring in front of the periphery of the iris.
Arcus Foundation
- The Arcus Foundation is a charitable foundation focused on issues related to LGBT rights, social justice and conservation.
Arcus cloud
- An arcus cloud is a low, horizontal cloud formation, usually appearing as an accessory cloud to a cumulonimbus.
Arcus-Air
- Arcus-Air GmbH & Co. KG is an airline based in Troisdorf, Germany, operating chartered cargo and corporate flights out of Mannheim City Airport.
Among the contents of this book we simply mention a trigonometrical chapter, in which the words sinus versus arcus occur, the approximate extraction of cube roots shown more at large than in the Liber abaci, and a very curious problem, which nobody would search for in a geometrical work, viz.
arcus הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד