adj
Meaning 1
Exhibiting radioactivity.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Standard Lemma guide
radioactive
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.
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Received-Pronunciation: /ˌɹeɪdiəʊˈaktɪv/
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Southern-England: Recorded audio is listed in the source snapshot.
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US: /ˌɹeɪdioʊˈæktɪv/
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rhymes with -æktɪv
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CMU ARPABET: R EY2 D IY0 OW0 AE1 K T IH0 V Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
adj
Meaning 2
Dangerous and disgusting, particularly of people or ideas.
Definition source: English Wiktionary via Wiktextract
Usage: figuratively, rare
Examples
- Even sleazy tactics and his radioactive mouth may not be able to contain this debacle.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
noun
Meaning 3
Any radioactive substance.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
adjective
Meaning 4
exhibiting or caused by radioactivity
Definition source: Princeton WordNet 3.0
Examples
- radioactive isotope
- radioactive decay
- radioactive fallout
Meaning relationships
Synonyms: none provided
Antonyms: nonradioactive
History
Etymology
Coined by Pierre Curie and Marie Curie in 1898 as French radio-actif, equivalent to English radio- + active.
Across languages
Translations
49 source translations are retained for this English entry.
- Afrikaans: radioaktief — exhibiting radioactivity
- Armenian: ռադիոակտիվ (ṙadioaktiv) — exhibiting radioactivity
- Armenian: ճառագայթաակտիվ (čaṙagaytʻaaktiv) — exhibiting radioactivity
- Asturian: radioactivu — exhibiting radioactivity
- Basque: erradioaktibo — exhibiting radioactivity
- Belarusian: радыёакты́ўны (radyjoaktýwny) — exhibiting radioactivity
- Bulgarian: радиоакти́вен (radioaktíven) — exhibiting radioactivity
- Catalan: radioactiu — exhibiting radioactivity
- Chinese Mandarin: 放射性 — exhibiting radioactivity
- Czech: radioaktivní — exhibiting radioactivity
- Danish: radioaktiv — exhibiting radioactivity
- Dutch: radioactief — exhibiting radioactivity
- Esperanto: radioaktiva — exhibiting radioactivity
- Faroese: geislavirkin — exhibiting radioactivity
- Finnish: radioaktiivinen — exhibiting radioactivity
- French: radioactif — exhibiting radioactivity
- Galician: radioactivo — exhibiting radioactivity
- Georgian: რადიოაქტიური (radioakṭiuri) — exhibiting radioactivity
- German: radioaktiv — exhibiting radioactivity
- Greek: ραδιοενεργό (radioenergó) — exhibiting radioactivity
- Hebrew: רדיואקטיבי (radioaktivi) — exhibiting radioactivity
- Hindi: विकिरणशील (vikiraṇśīl) — exhibiting radioactivity
- Hungarian: radioaktív — exhibiting radioactivity
- Icelandic: geislavirkur — exhibiting radioactivity
- Ido: radioaktiva — exhibiting radioactivity
- Indonesian: radioaktif — exhibiting radioactivity
- Italian: radioattivo — exhibiting radioactivity
- Japanese: 放射性 — exhibiting radioactivity
- Kazakh: радиоактивті (radioaktivtı) — exhibiting radioactivity
- Kazakh: радиоактивтік (radioaktivtık) — exhibiting radioactivity
- Lithuanian: radioaktyvus — exhibiting radioactivity
- Māori: iraruke — exhibiting radioactivity
- Mongolian: цацраг идэвхит (cacrag idevxit) — exhibiting radioactivity
- Polish: radioaktywny — exhibiting radioactivity
- Portuguese: radioactivo — exhibiting radioactivity
- Portuguese: radioativo — exhibiting radioactivity
- Romanian: radioactiv — exhibiting radioactivity
- Russian: радиоакти́вный (radioaktívnyj) — exhibiting radioactivity
- Scottish Gaelic: rèidio-beò — exhibiting radioactivity
- Serbo-Croatian: радиоактивни — exhibiting radioactivity
- Serbo-Croatian: radioaktivni — exhibiting radioactivity
- Slovak: rádioaktívny — exhibiting radioactivity
- Slovene: radioaktíven — exhibiting radioactivity
- Spanish: radiactivo — exhibiting radioactivity
- Swedish: radioaktiv — exhibiting radioactivity
- Thai: กัมมันตรังสี — exhibiting radioactivity
- Turkish: radyoaktif — exhibiting radioactivity
- Ukrainian: радіоакти́вний (radioaktývnyj) — exhibiting radioactivity
- Urdu: تابْکار (tābkār) — exhibiting radioactivity
Real reading context