Half Life

nounid 74021·updated May 18, 2026

verified

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the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)

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per-axis with provenance

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Variants

6 surface forms

synonym: half lifehalf-life
alternatephrasing: Half-Life
plural: Half Lives
possessive: Half Life's
pluralpossessive: Half Lives'

Framework definitions

1 sense across 1 framework

Wordset Dictionary1 senseview framework →

§1: the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)

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