noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A unit of angle; 1/60th of an arcminute, or 1/3600th of a degree.
2. 2
   a 60th part of a minute of arc wordnet

Synonyms

All synonyms

arcsecarcsecasassecondsecond

Example

More examples

"One parsec is the distance at which one astronomical unit subtends an angle of one arcsecond."

Etymology

From arc + second.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.