half-life
 noun
 semivida
EN Iodine-131 has a half-life (the time it takes for half the atoms of a radioactive isotope to decay) of eight days.
GL O iodo 131 ten unha semivida ou período (tempo necesario para que se desintegre a metade dos átomos dun isótopo radioactivo) de oito días.
 Fonte: C03 (786)
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half, half-breed, half-brother, half-destroyed, half-dozen, half-hearted, half-hidden, half-hour, half-human, half-life, half-literate, half-past, half-tone, half-truth, half-way, half-yearly, halitosis, halitus, hall