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== Previous glossary entries ==
=== from [[ICRP Publication 139]], 2018 ===
The tissue-weighted sum of the equivalent doses in all specified tissues and organs of the body given by the expression:
<math>
E = \sum_t w_T \sum_R w+R D_{T,R}
</math>
where <math>w_T</math> is the tissue weighting factor for tissue or organ <math>T</math> and <math>w_R</math> is the radiation weighting factor. The unit for effective dose is the same as for absorbed dose J kg<sup>-1</sup> and its special name is sievert (Sv). The sum is performed over all organs and tissues of the human body considered to be sensitive to the induction of stochastic effects. The tissue weighting factors are age- and sex-averaged and intended to apply as rounded values to a population of both sexes and all ages.
=== from [[ICRP Publication 129]], 2015 ===