| 单词 |
roentgen-equivalent-physical |
| 释义 |
roentgen-equivalent-physical roent·gen-e·quiv·a·lent-phys·i·calobsolete unit of measurement; that quantity of ionizing radiation of any kind that, upon absorption by living tissue, produces an energy gain per gram of tissue equivalent to that produced by 1 rad of x-rays or gamma-rays. See: rad. |
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