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1. Dictionary

   lifetime

   /ˈlʌɪftʌɪm/

   noun

   • 1. the duration of a person's life: "a reward for a lifetime's work" Similar lifespanlifedaysduration of lifeallotted spancourse of lifetime on earthexistenceone's timeone's careerone's threescore years and tenthis mortal coilinformal:one's born days
   • ▪ the duration of a thing's existence or usefulness: "fifteen shops closed during the lifetime of the scheme" Similar durationlifeactive lifeexistencelife expectancyfunctioning periodperiod of effectiveness/usefulness/validity/efficacy
   • ▪ a very long period of time: "five weeks was a lifetime, anything could have happened" Similar all one's lifea very long timean eternityhoursdaysmonthsyearsaeonshours/days/months on endinformal:ages (and ages)an age

   Scrabble Points: 13

   • L

     1

   • I

     1

   • F

     4

   • E

     1

   • T

     1

   • I

     1

   • M

     3

   • E

     1

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2. en.wikipedia.org › wiki › Radioactive_decayRadioactive decay - Wikipedia

   en.wikipedia.org › wiki › Radioactive_decay

   • Cached

   22 hours ago · v. t. e. Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha, beta, and gamma decay.

3. en.wikipedia.org › wiki › C++C++ - Wikipedia

   en.wikipedia.org › wiki › C++

   • Cached

   22 hours ago · C++ Programming at Wikibooks. C++ (/ ˈsiː plʌs plʌs /, pronounced " C plus plus " and sometimes abbreviated as CPP) is a high-level, general-purpose programming language created by Danish computer scientist Bjarne Stroustrup.