arc second

A form of arcsecond — A unit of angle; 1/60th of an arcminute, or 1/3600th of a degree.

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Meanings

nounarc second (plural arc seconds)

plural arc seconds

  1. alternativeAlternative form of arcsecond.
Cite this entry
APA

arc second. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/arc%20second

MLA

“arc second.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/arc%20second. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “arc second,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/arc%20second.

Source: arc second on Wiktionary, CC BY-SA 4.0.