A radioactive isotope of sulfur; for example, 35S.

radioactive sulphur

Any of the radioactive isotopes of sulphur, of which 35S is used to tag nucleic acids and is preferable to 32P as it has a longer half-life (88 days), a lower energy and bands on gels more precise.
References in periodicals archive ?
4] less rapidly and retain a larger fraction of their radiosulfur as [sup.
1, except that the leaf tissue did not demonstrate net export of radiosulfur until after the second harvest, and did not mobilize its [sup.
2 slowed their radiosulfur acquisition, taking up only a small amount of [sup.