冢子 [－－]

Jyutping cung2 zi2
Pinyin zhǒng zǐ

Definitions (Wiktionary)
  1. noun, literary
    eldest son of one's legal wife
    (syn.) 冢息, 嫡長子, 冢嗣, 嫡长子
  2. noun, literary
    crown prince
    (syn.) 太子