decay series

noun Physics, Chemistry.

1. a succession of elements initiated in the radioactive decay of a parent, as thorium or uranium, each of which decays into the next until a stable element, usually lead, is produced.

noun Physics.

1. radioactive series.

noun

1. physics a series of nuclides each of which undergoes radioactive decay into the next member of the series, ending with a stable element, usually leadSee uranium series, neptunium series, thorium series, actinium series