中叶

中葉
zhōngyè
  1. mid- (e.g. mid-century)
  2. middle period

CEDICT

middle part of a period (eg. of a century, dynasty, etc.)

Wiktionary

朝代或世纪的中期。

重編國語辭典

某一时代或年代的中间时期

維基詞典

Entry Composition

1 中 zhōng
  1. within; among; in
  2. middle; center
  3. while (doing sth); during
  4. (dialect) OK; all right
2 叶 yè
  1. leaf
  2. page
  3. lobe
  4. (historical) period
  5. classifier for small boats