衰變 [－变]

Jyutping seoi1 bin3
Pinyin shuāi biàn

Definitions (CC-CEDICT)
  1. radioactive decay
Definitions (粵典–words.hk)
  1. 名詞
    具​放射性​物質​，​（​化學上​）​由​一​元素​變成​另​一種​、​（​物理​上​）​由​一​基本粒子​變成​另​一​種​嘅​過​程
    (radioactivity) decay
Definitions (Wiktionary)
  1. verb, of a nucleus
    to decay
    (syn.) 蛻變, 蜕变