English
half-life
From half- + life.
Today it means
noun The time required for half the nuclei in a sample of an isotope to undergo radioactive decay.
Language periods are conventional ranges, not dates for this word.
Etymograph / half-life
English
From half- + life.
noun The time required for half the nuclei in a sample of an isotope to undergo radioactive decay.
Language periods are conventional ranges, not dates for this word.
Etymograph / half-life