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| decay half-life; half-life time; half-life value | |||
| half-life The time required for one-half the atoms of a given amount of radioactive material to undergo radioactive decay | |||
| biological half-life | |||
| half-life; half-life period; radioactive half-life | |||
| elimination half-life; metabolic half-life; metabolic half-time | |||
| poolestusaeg: 3 phrases in 2 subjects |
| Medical | 1 |
| Natural sciences | 2 |