arc second

noun

Meaning

A unit of angular measurement equal to 1/3600th of a degree.

Examples

Astronomers use the arc second to measure the incredibly small distances between stars in the night sky.
The telescope's resolution was so precise that it could distinguish objects separated by only a single arc second.

Synonyms: second of arc, arcsec

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arc second

noun

Pronunciation: /ˈɑːrk ˌsek.ənd/

Definition

A unit of angular measurement equal to 1/3600th of a degree.

Examples

Astronomers use the arc second to measure the incredibly small distances between stars in the night sky.
The telescope's resolution was so precise that it could distinguish objects separated by only a single arc second.

Synonyms of arc second

Words with a similar meaning to arc second:

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