Standard Lemma guide

arcsecond

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

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

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a 60th part of a minute of arc

Definition source: Princeton WordNet 3.0

Examples

  • the treasure is 2 minutes and 45 seconds south of here

Meaning relationships

Synonyms: second

Antonyms: none provided

Broader terms: angular unit

History

Etymology

From arc + second.