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lifetime |
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lifetime 1. a. the length of time a person or animal is alive b. (as modifier): a lifetime supply 2. Physics the average time of existence of an unstable or reactive entity, such as a nucleus, excited state, elementary particle, etc.; mean life lifetime [′līf‚tīm] (physics) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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