radioactivity

See also: radio-activity

English

Alternative forms

• radio-activity

Etymology

From radioactive +‎ -ity.

Pronunciation

• Audio (Southern England):

  (file)

Noun

radioactivity (usually uncountable, plural radioactivities)

1. Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.
2. The radiation so emitted; including gamma rays, alpha particles, neutrons, electrons, positrons, etc.

Related terms

• activity
• radiation
• radio-

 

Translations

emission of ionizing radiation

• Afrikaans: radioaktiwiteit
• Basque: erradioaktibitate
• Bulgarian: радиоактивност f (radioaktivnost)
• Catalan: radioactivitat f
• Chinese:

  Mandarin: 放射性 (zh) (fàngshèxìng)

• Czech: radioaktivita (cs) f
• Danish: radioaktivitet (da) c
• Dutch: radioactiviteit (nl) f
• Esperanto: radioaktiveco
• Faroese: geislavirkni n
• Finnish: radioaktiivisuus (fi)
• French: radioactivité (fr) f
• Georgian: რადიოაქტიურობა (radioakṭiuroba), რადიაქტივობა (radiakṭivoba)
• German: Radioaktivität (de) f
• Greek: ραδιενέργεια (el) f (radienérgeia)
• Hebrew: רדיואקטיביות (he) f (radioaktíviyut)
• Icelandic: geislavirkni f
• Irish: radaighníomhaíocht f
• Japanese: 放射能 (ja) (ほうしゃのう, hōshanō)
• Kazakh: радиоактивтік (radioaktivtık)
• Korean: 방사능(放射能) (ko) (bangsaneung)
• Norwegian:

  Bokmål: radioaktivitet m

  Nynorsk: radioaktivitet m

• Polish: radioaktywność (pl) f, promieniotwórczość (pl) f
• Portuguese: radioatividade (pt) f
• Romanian: radioactivitate (ro)
• Russian: радиоакти́вность (ru) f (radioaktívnostʹ)
• Scottish Gaelic: rèididheachd
• Spanish: radioactividad (es) f
• Swedish: radioaktivitet (sv) c
• Tagalog: karagilapan
• Thai: กัมมันตภาพรังสี (th)
• Ukrainian: радіоактивність f (radioaktyvnistʹ)
• Vietnamese: sự phóng xạ
• Welsh: ymbelydredd m

radiation emitted

• Afrikaans: radioaktiwiteit
• Basque: erradioaktibitate
• Belarusian: радыеакты́ўнасць f (radyjeaktýŭnascʹ)
• Bulgarian: радиоакти́вност f (radioaktívnost)
• Catalan: radioactivitat f
• Chinese:

  Mandarin: 放射 (zh) (fàngshè), 放射線／放射线 (zh) (fàngshèxiàn)

• Czech: radioaktivita (cs) f
• Dutch: radioactiviteit (nl) f
• Finnish: radioaktiivisuus (fi)
• French: radioactivité (fr) f
• Georgian: რადიოაქტიურობა (radioakṭiuroba), რადიაქტივობა (radiakṭivoba)
• German: Radioaktivität (de) f
• Greek: ραδιενέργεια (el) f (radienérgeia)
• Hebrew: קרינה (he) m (kriná)
• Hindi: please add this translation if you can
• Irish: radaighníomhaíocht f
• Italian: please add this translation if you can
• Kazakh: радиобелсенділік (radiobelsendılık), радиоактивтік (radioaktivtık)
• Korean: please add this translation if you can
• Luxembourgish: Radioaktivitéit f
• Norwegian:

  Bokmål: radioaktivitet m

  Nynorsk: radioaktivitet m

• Portuguese: radioatividade (pt) f
• Russian: радиоакти́вность (ru) f (radioaktívnostʹ)
• Scottish Gaelic: rèididheachd f
• Slovak: rádioaktivita f
• Spanish: radioactividad (es) f
• Swedish: radioaktivitet (sv) c
• Thai: รังสี (th) (rang-sǐi)
• Turkish: please add this translation if you can
• Ukrainian: радіоакти́вність f (radioaktývnistʹ)
• Urdu: please add this translation if you can
• Welsh: ymbelydredd m

The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

Translations to be checked

• Italian: ^{(please verify)} radioattività (it) f
• Slovene: ^{(please verify)} radioaktivnost m

See also

• half-life

Further reading

• Radioactive decay on Wikipedia.Wikipedia