arcsecond
Noun. A unit of angle; 1/60th of an arcminute, or 1/3600th of a degree.This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.