1. in a manner involving or characterized by radioactivity
Usage: scientific/technical

Examples

• The uranium sample glowed radioactively in the laboratory.
• The contaminated soil was radioactively decaying for decades.
• Scientists measured how radioactively the isotope was emitting particles.
• The waste material continued to behave radioactively long after disposal.
• The elements in the reactor core were radioactively unstable.
• The detector showed that the rock was radioactively active.