母子

mǔzǐ
  1. mother and child
  2. parent and subsidiary (companies)
  3. principal and interest

CEDICT

Entry Composition

1 母 mǔ
  1. mother
  2. elderly female relative
  3. origin
  4. source
  5. (of animals) female
=2 子 zǐ
  1. son
  2. child
  3. seed
  4. egg
  5. small thing
  6. 1st earthly branch: 11 p.m.–1 a.m., midnight, 11th solar month (7th December to 5th January), year of the rat
  7. viscount, fourth of five orders of nobility 五等爵位 wǔděngjuéwèi
  8. ancient Chinese compass point: 0° (north)
  9. subsidiary; subordinate; (prefix) sub-
=2 子 zi noun suffix, as in 椅子 yǐzi "chair"