also: ちゃくにょ
noun
eldest legitimate daughter
Archaic term referring to the eldest daughter born to a legal wife, as opposed to a concubine. Used in historical or literary contexts.
江戸時代の武家では、嫡女が家を継ぐこともあった。
In samurai families of the Edo period, the eldest legitimate daughter sometimes succeeded the household.
この物語の主人公は、大名家の嫡女として生まれた。
The protagonist of this story was born as the eldest legitimate daughter of a daimyo family.
From 嫡 (legitimate, direct descent) + 女 (daughter). The term reflects historical family structures where legitimacy of birth was significant.