周期系

週期系
zhōuqīxì
  1. periodic system
  2. periodicity (chemistry)

CEDICT

chemistry

Entry Composition

1 周期 zhōuqī
  1. period
  2. cycle
=2 系 xì
  1. to connect
  2. to relate to
  3. to tie up
  4. to bind
  5. to be (literary)
=2 系 xì
  1. system
  2. department
  3. faculty
=2 系 xì
  1. to connect
  2. to arrest
  3. to worry