主干家庭

主幹家庭
zhǔgànjiātíng
  1. (Mainland China) family of two generations, each of one couple only
  2. family of two generations, each of one couple only

Wiktionary

Entry Composition

1 主干 zhǔgàn
  1. trunk
  2. main
  3. core
2 家庭 jiātíng
  1. family
  2. household

classifiers: 戶, 個