half-life

Noun

 * 1)  The time required for half the nuclei in a sample of an isotope to undergo radioactive decay.
 * 2)  In a chemical reaction, the time required for the concentration of a reactant to fall from a chosen value to half that value.
 * 3)  The time it takes for a substance (drug, radioactive nuclide, or other) to lose half of its pharmacological, physiologic, or radiological activity.
 * 4) The time it takes for an idea or a fashion to lose half of its influential power.
 * 5) * 1991, Robert Ackerman, Introduction to Jane Ellen Harrison's Prolegomena to the Study of Greek Religion (1903)
 * Most books of scholarship have surprisingly short intellectual 'half-lives during which they make a difference"

Translations

 * Afrikaans:
 * Armenian:
 * Azerbaijani: yarımdağılma dövrü
 * Belarusian: перыяд паўраспаду
 * Bulgarian: период на полуразпад
 * Catalan: període de semidesintegració, període radioactiu
 * Chinese:
 * Mandarin:
 * Czech: poločas rozpadu
 * Danish:
 * Dutch: ,
 * Esperanto: duoniĝa tempo
 * Estonian:
 * Finnish:
 * French:
 * Galician: período de semidesintegración
 * Georgian: ნახევარდაშლის პერიოდი, ნახევრად დაშლის პერიოდი
 * German:
 * Greek: χρόνος ημιζωής
 * Hebrew:
 * Hindi: अर्धायु
 * Hungarian:
 * Icelandic: helmingunartími
 * Indonesian: waktu paruh
 * Irish:
 * Italian:, semivita
 * Japanese: 半減期
 * Kannada: ಅರ್ಧಾಯುಷ್ಯ
 * Kazakh: жартылай ыдырау мерзімі
 * Korean:
 * Latvian: pussabrukšanas periods
 * Lithuanian: pusėjimo trukmė
 * Macedonian: период на полураспад
 * Malay: separuh hayat
 * Malayalam: അർദ്ധായുസ്സ്
 * Norwegian:
 * Bokmål:
 * Nynorsk: halveringstid
 * Persian: نیمه‌عمر
 * Polish: czas połowicznego rozpadu, okres połowicznego rozpadu
 * Portuguese: meia-vida, semivida
 * Romanian:
 * Russian:
 * Serbo-Croatian:
 * Roman: vreme poluraspada
 * Slovak: polčas premeny
 * Slovene: razpolovni čas
 * Spanish: periodo de semidesintegración; semivida, vida media
 * Swedish:
 * Tagalog: kalahatimbuhay
 * Tamil: அரைவாழ்வுக் காலம்
 * Telugu: అర్థ జీవితకాలం
 * Thai: ครึ่งชีวิต
 * Turkish:
 * Ukrainian: пері́од напівро́зпаду
 * Urdu:
 * Uzbek: yarim yemirilish davri
 * Vietnamese: chu kì bán rã, chu kỳ bán rã, chu kỳ nửa phân rã


 * Catalan: semivida
 * Finnish:
 * French:
 * German:
 * Hungarian:
 * Indonesian: waktu paruh
 * Italian:, semivita
 * Japanese: 半減期
 * Malay: separuh hayat
 * Russian: пери́од полужи́зни
 * Spanish: semivida
 * Tagalog: kalahatimbuhay


 * Catalan: semivida
 * Finnish:
 * Indonesian: waktu paruh
 * Japanese: 半減期
 * Malay: separuh hayat
 * Norwegian:
 * Bokmål:
 * Nynorsk: halveringstid
 * Russian: пери́од полувыведе́ния


 * Finnish:


 * Arabic: عُمْر النِصْف
 * Esperanto: duoniĝa tempo
 * Estonian:
 * Greek: περίοδος ημιζωής (1)
 * Hebrew: מחצית חיים
 * Icelandic: helmingunartími (1)
 * Italian: tempo di dimezzamento (1,2,3)
 * Portuguese: período de semidesintegração