乙种粒子

乙種粒子
yǐzhǒnglìzǐ
beta particle (electron, esp. high speed electron emitted by radioactive nucleus)

CEDICT

Entry Composition

1 乙种 yǐzhǒng type B; category B; second class or grade; beta-
=2 粒子 lìzǐ
  1. (elementary) particle
  2. grain
=2 粒子 lìzi
  1. grain (of rice)
  2. granule