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the time required for a living tissue, organ, or organism to eliminate one half of a radioactive substance which has been introduced into it.Medical dictionary. 2011.
Biological half-life — For other uses, see Half life (disambiguation). The biological half life or elimination half life of a substance is the time it takes for a substance (for example a metabolite, drug, signalling molecule, radioactive nuclide, or other substance)… … Wikipedia
biological half-life — noun : the time that a living body requires to eliminate one half the quantity of an administered substance (as a radioisotope) through its normal channels of elimination * * * biological half life, the time required for a substance deposited in… … Useful english dictionary
biological half-life — biologinė pusėjimo trukmė statusas T sritis Standartizacija ir metrologija apibrėžtis Laiko tarpas, per kurį radionuklido kiekis organe, audinyje arba organizme dėl biologinių procesų (biologinio išskyrimo) sumažėja pusiau. Matavimo vienetas –… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
biological half-life — biologinė pusėjimo trukmė statusas T sritis fizika atitikmenys: angl. biological half life vok. biologische Halbwertzeit, f rus. биологический период полувыведения, m; период полувыведения, m; период полувыведения радиоактивного вещества, m pranc … Fizikos terminų žodynas
Half-life (disambiguation) — Half life is a mathematical and scientific description of exponential decay.Half life may also refer to: * Biological half life, pertaining to organisms (also refers to elimination half life , a pharmacokinetic parameter in medicine) ** Effective … Wikipedia
Half-life — This article is about the scientific and mathematical term. For other uses, see Half life (disambiguation). Number of half lives elapsed Fraction remaining Percentage remaining 0 1/1 100 1 1/2 50 2 … Wikipedia
Effective half-life — denotes the halving of radioactive material in a living organism by means of radioactive decay and biological excretion. A decay constant is needed to calculate the half life. It is the sum of the biological and physical decay constants, as in… … Wikipedia
biological half-time — See half life … Military dictionary
half-life — The time required for the activity of a given radioactive species to decrease to half of its initial value due to radioactive decay. The half life is a characteristic property of each radioactive species and is independent of its amount or… … Military dictionary
Combine (Half-Life) — The Combine The Combine clamp symbol, seen commonly throughout the series Series Half Life series First game Half Life 2 (2004) … Wikipedia
