换牙

換牙
huànyá
  1. to grow replacement teeth (zoology)
  2. to grow permanent teeth in place of milk teeth

CEDICT

  1. (of a child) to grow permanent teeth to replace milk teeth
  2. to grow permanent teeth to replace milk teeth

Wiktionary

乳齿逐一脱落，由恆齿长出替换的现象。一般人在六岁到八岁时开始换牙，十二岁到十四岁时全部换成恆齿。

重編國語辭典

Entry Composition

1 换 huàn
  1. to exchange
  2. to change (clothes etc)
  3. to substitute
  4. to switch
  5. to convert (currency)
2 牙 yá
  1. tooth
  2. ivory

classifier: 顆