radioactive

Adjective

WordNet 3.0

Adjective (1)

  1. exhibiting or caused by radioactivity“radioactive isotope”“radioactive decay”“radioactive fallout”
Advertisement

Webster's Dictionary (GCIDE)

radioactive \ra`di*o*ac"tive\ (r[=a]`d[i^]*[-o]*[a^]k"t[i^]v), a. [Radio- + active.]

1.(Physics) Capable of luminescence under the action of cathode rays, X rays, or any of the allied forms of radiation. [obsolete] [Webster 1913 Suppl.]

2.(Physics) of, exhibiting, or caused by radioactivity. [PJC]

Advertisement