Associations to the word «Radioactivity»

Wiktionary

RADIOACTIVITY, noun. Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.
RADIOACTIVITY, noun. The radiation so emitted; including gamma rays, alpha particles, neutrons, electrons, positrons, etc.

Dictionary definition

RADIOACTIVITY, noun. The spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay.

Wise words

Four things come not back. The spoken word, the sped arrow, the past life, ad the neglected opportunity.
Arabian Proverb