arc second

noun

: second entry 4 sense 1a

Examples of arc second in a Sentence

Recent Examples on the Web

Fudd instantly silenced the Huskies coach’s blustering by draining her fourth shot from beyond the arc seconds after Georgetown’s make. — Emily Adams, Hartford Courant, 27 Feb. 2026

The Gaia satellite, however, is off by no more than 24 millionths of an arc second, the width of a human hair from 1,000 kilometers away. — Ann Finkbeiner, Scientific American, 1 Feb. 2024

Webb also has a small fine-steering mirror in the optical path, which can tilt over an angle of just 5 arc seconds. — Jeff Hecht, IEEE Spectrum, 6 July 2022

Word History

First Known Use

1885, in the meaning defined above

Rhymes for arc second

• beckoned
• reckoned
• seconde
• femtosecond
• microsecond
• millisecond
• nanosecond
• picosecond