Standard Lemma guide

steradian

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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  • /stəˈɹeɪ.diən/
  • US: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

In the International System of Units, the derived unit of solid angle; the solid angle subtended at the centre of a sphere of radius r by a portion of the surface of the sphere that has area r2. Symbol: sr

Definition source: English Wiktionary via Wiktextract

Topics: geometry, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

the unit of solid angle adopted under the Systeme International d'Unites

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: sr

Antonyms: none provided

Broader terms: angular unit

History

Etymology

ste(reo) + radian

Across languages

Translations

21 source translations are retained for this English entry.

  • Chinese Mandarin: 球面度 (qiúmiàndù) — derived unit of solid angle
  • Czech: steradián — derived unit of solid angle
  • Dutch: steradiaal — derived unit of solid angle
  • Esperanto: steradiano — derived unit of solid angle
  • Estonian: steradiaan — derived unit of solid angle
  • Finnish: steradiaani — derived unit of solid angle
  • French: stéradian — derived unit of solid angle
  • German: Steradiant — derived unit of solid angle
  • Greek: στερακτίνιο (steraktínio) — derived unit of solid angle
  • Indonesian: steradian — derived unit of solid angle
  • Japanese: ステラジアン (suterajian) — derived unit of solid angle
  • Kazakh: стерадиан (steradian) — derived unit of solid angle
  • Malay: steradian — derived unit of solid angle
  • Polish: steradian — derived unit of solid angle
  • Portuguese: esterradiano — derived unit of solid angle
  • Portuguese: esferorradiano — derived unit of solid angle
  • Romanian: steradian — derived unit of solid angle
  • Russian: стерадиа́н (steradián) — derived unit of solid angle
  • Spanish: estereorradián — derived unit of solid angle
  • Swedish: steradian — derived unit of solid angle
  • Thai: สเตอเรเดียน (sa-təə-ree-dîian) — derived unit of solid angle