Standard Lemma guide

astatine

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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • UK: asʹtətēn
  • UK: /ˈastətiːn/
  • US: ăs'tətēn
  • US: /ˈæstəˌtin/
  • General-American: Recorded audio is listed in the source snapshot.
  • US: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

A highly radioactive chemical element (symbol At), one of the halogens, with atomic number 85.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: alabamine, anglohelvetium

Antonyms: none provided

2

noun

Meaning 2

a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: At, atomic number 85

Antonyms: none provided

Broader terms: chemical element, element, halogen

History

Etymology

From Ancient Greek ἄστατος (ástatos, “unstable”) + -ine.

Across languages

Translations

79 source translations are retained for this English entry.

  • Afrikaans: astaat — the chemical element
  • Albanian: astat — the chemical element
  • Arabic: أَسْتَاتِين (ʔastātīn) — the chemical element
  • Armenian: աստատ (astat) — the chemical element
  • Asturian: astatu — the chemical element
  • Basque: astatoa — the chemical element
  • Belarusian: аста́т (astát) — the chemical element
  • Bengali: অ্যাস্টাটিন (êsṭaṭin) — the chemical element
  • Breton: astat — the chemical element
  • Bulgarian: астати́н (astatín) — the chemical element
  • Catalan: àstat — the chemical element
  • Chinese Mandarin: 砹 (ài) — the chemical element
  • Cornish: astatin — the chemical element
  • Czech: astat — the chemical element
  • Danish: astat — the chemical element
  • Dutch: astatium — the chemical element
  • Dutch: astaat — the chemical element
  • Esperanto: astato — the chemical element
  • Estonian: astaat — the chemical element
  • Faroese: astatan — the chemical element
  • Finnish: astatiini — the chemical element
  • French: astate — the chemical element
  • West-Frisian: astaat — the chemical element
  • Friulian: astat — the chemical element
  • Galician: ástato — the chemical element
  • Georgian: ასტატი (asṭaṭi) — the chemical element
  • German: Astat — the chemical element
  • German: Astatin — the chemical element
  • Greek: άστατο (ástato) — the chemical element
  • Hebrew: אסטטין (astatín) — the chemical element
  • Hindi: लावणी (lāvṇī) — the chemical element
  • Hungarian: asztácium — the chemical element
  • Icelandic: astat — the chemical element
  • Indonesian: astatin — the chemical element
  • Irish: astaitín — the chemical element
  • Italian: astato — the chemical element
  • Japanese: アスタチン (asutachin) — the chemical element
  • Kashubian: astat — the chemical element
  • Kazakh: астат (astat) — the chemical element
  • Khmer: អាស្តាត (ʼaastaat) — the chemical element
  • Korean: 아스타틴 (aseutatin) — the chemical element
  • Latin: astatium — the chemical element
  • Latvian: astats — the chemical element
  • Lithuanian: astatinas — the chemical element
  • Luxembourgish: Astat — the chemical element
  • Macedonian: аста́т (astát) — the chemical element
  • Malay: astatin — the chemical element
  • Maltese: astat — the chemical element
  • Manx: astaçheen — the chemical element
  • Mongolian: астат (astat) — the chemical element
  • Norwegian Bokmål: astat — the chemical element
  • Norwegian Nynorsk: astat — the chemical element
  • Occitan: astat — the chemical element
  • Persian: استاتین (astâtin) — the chemical element
  • Polish: astat — the chemical element
  • Portuguese: astato — the chemical element
  • Romanian: astatin — the chemical element
  • Romanian: astatiniu — the chemical element
  • Russian: аста́т (astát) — the chemical element
  • Russian: астати́н (astatín) — the chemical element
  • Scottish Gaelic: astatain — the chemical element
  • Serbo-Croatian: а̀ста̄т — the chemical element
  • Serbo-Croatian: àstāt — the chemical element
  • Slovak: astat — the chemical element
  • Slovene: astat — the chemical element
  • Spanish: astato — the chemical element
  • Swedish: astat — the chemical element
  • Tajik: астат (astat) — the chemical element
  • Tamil: அஸ்தாதைன் (astātaiṉ) — the chemical element
  • Thai: แอสทาทีน (ɛ́ɛs-taa-tiin) — the chemical element
  • Turkish: astat — the chemical element
  • Turkish: astatin — the chemical element
  • Ukrainian: аста́т (astát) — the chemical element
  • Uzbek: astat — the chemical element
  • Uzbek: astatin — the chemical element
  • Uzbek: астат (astat) — the chemical element
  • Vietnamese: astatin — the chemical element
  • Volapük: lastatin — the chemical element
  • Welsh: astatin — the chemical element