Plutonium-244 has a half-life of 80 million years.
Source: tatoeba (1215162)
Half-life
//ˈhæfˌlaɪf//
Synonyms for "half-life" (8 found)
Ranked by relevance and common usage.
Closest matches (2)
Strong matches (2)
Related words (4)
Related word relations
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
More general
3 entriesRelated terms
1 entriesTranslations
83 translations across 51 languages.
Armenian
1 entries- կիսատրոհման պարբերություն noun (time in physics)
Azerbaijani
1 entries- yarımdağılma dövrü noun (time in physics)
Belarusian
1 entries- перыяд паўраспаду noun (time in physics)
Bulgarian
1 entries- период на полуразпад noun (time in physics)
Catalan
4 entries- període de semidesintegració noun (time in physics)
- període radioactiu noun (time in physics)
- semivida noun (chemistry: time required for concentration to fall to half)
- semivida noun (medicine: time for a substance to lose half of its activity)
Chinese Mandarin
1 entries- 半衰期 noun (time in physics)
Czech
1 entries- poločas rozpadu noun (time in physics)
Danish
1 entries- halveringstid noun (time in physics)
Dutch
2 entries- halfwaardetijd noun (time in physics)
- halveringstijd noun (time in physics)
Esperanto
1 entries- duoniĝa tempo noun (time in physics)
Estonian
1 entries- poolestusaeg noun (time in physics)
Finnish
4 entries- puoliintumisaika noun (time in physics)
- puoliintumisaika noun (chemistry: time required for concentration to fall to half)
- puoliintumisaika noun (medicine: time for a substance to lose half of its activity)
- puoliintumisaika noun (time to lose half of influential power of an idea or fashion)
French
2 entries- demi-vie noun (time in physics)
- demi-vie noun (chemistry: time required for concentration to fall to half)
Galician
1 entries- período de semidesintegración noun (time in physics)
Georgian
2 entries- ნახევარდაშლის პერიოდი noun (time in physics)
- ნახევრად დაშლის პერიოდი noun (time in physics)
German
2 entries- Halbwertszeit noun (time in physics)
- Halbwertszeit noun (chemistry: time required for concentration to fall to half)
Greek
1 entries- χρόνος ημιζωής noun (time in physics)
Hindi
1 entries- अर्धायु noun (time in physics)
Hungarian
2 entries- felezési idő noun (time in physics)
- felezési idő noun (chemistry: time required for concentration to fall to half)
Icelandic
1 entries- helmingunartími noun (time in physics)
Indonesian
3 entries- waktu paruh noun (time in physics)
- waktu paruh noun (chemistry: time required for concentration to fall to half)
- waktu paruh noun (medicine: time for a substance to lose half of its activity)
Irish
1 entries- leathré noun (time in physics)
Italian
4 entries- emivita noun (time in physics)
- emivita noun (chemistry: time required for concentration to fall to half)
- semivita noun (time in physics)
- semivita noun (chemistry: time required for concentration to fall to half)
Japanese
3 entries- 半減期 noun (time in physics)
- 半減期 noun (chemistry: time required for concentration to fall to half)
- 半減期 noun (medicine: time for a substance to lose half of its activity)
Kannada
1 entries- ಅರ್ಧಾಯುಷ್ಯ noun (time in physics)
Kazakh
1 entries- жартылай ыдырау мерзімі noun (time in physics)
Korean
1 entries- 반감기 noun (time in physics)
Latvian
1 entries- pussabrukšanas periods noun (time in physics)
Lithuanian
1 entries- pusėjimo trukmė noun (time in physics)
Macedonian
1 entries- период на полураспад noun (time in physics)
Malay
3 entries- separuh hayat noun (time in physics)
- separuh hayat noun (chemistry: time required for concentration to fall to half)
- separuh hayat noun (medicine: time for a substance to lose half of its activity)
Malayalam
1 entries- അർദ്ധായുസ്സ് noun (time in physics)
Norwegian Bokmål
2 entries- halveringstid noun (time in physics)
- halveringstid noun (medicine: time for a substance to lose half of its activity)
Norwegian Nynorsk
2 entries- halveringstid noun (time in physics)
- halveringstid noun (medicine: time for a substance to lose half of its activity)
Persian
1 entries- نیمهعمر noun (time in physics)
Polish
2 entries- czas połowicznego rozpadu noun (time in physics)
- okres połowicznego rozpadu noun (time in physics)
Portuguese
2 entries- meia-vida noun (time in physics)
- semivida noun (time in physics)
Romanian
1 entries- perioadă de înjumătățire noun (time in physics)
Russian
3 entries- пери́од полувыведе́ния noun (medicine: time for a substance to lose half of its activity)
- пери́од полужи́зни noun (chemistry: time required for concentration to fall to half)
- пери́од полураспа́да noun (time in physics)
Serbo-Croatian
1 entries- vreme poluraspada noun (time in physics)
Slovak
1 entries- polčas premeny noun (time in physics)
Slovene
1 entries- razpolovni čas noun (time in physics)
Spanish
4 entries- periodo de semidesintegración noun (time in physics)
- semivida noun (time in physics)
- semivida noun (chemistry: time required for concentration to fall to half)
- vida media noun (time in physics)
Swedish
1 entries- halveringstid noun (time in physics)
Tagalog
2 entries- kalahatimbuhay noun (time in physics)
- kalahatimbuhay noun (chemistry: time required for concentration to fall to half)
Tamil
1 entries- அரைவாழ்வுக் காலம் noun (time in physics)
Telugu
1 entries- అర్థ జీవితకాలం noun (time in physics)
Thai
1 entries- ครึ่งชีวิต noun (time in physics)
Ukrainian
1 entries- пері́од напівро́зпаду noun (time in physics)
Uzbek
1 entries- yarim yemirilish davri noun (time in physics)
Vietnamese
3 entries- chu kì bán rã noun (time in physics)
- chu kỳ bán rã noun (time in physics)
- chu kỳ nửa phân rã noun (time in physics)
Sample sentences
8 total sentences available.
Plutonium-239 has a half-life of 24,100 years.
Source: tatoeba (1215164)
The Half-Life logo is actually a Greek letter known as the lambda.
Source: tatoeba (8682908)
Half-Life: Alyx is widely expected to be a killer app for VR.
Source: tatoeba (8684691)
Showing 4 of 8 available sentences.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.