胤いん裔えいいんえいじ字FuriganaMeanings1noundescendant; successorarchaicArchaic term for a descendant or successor, especially in a lineage or family line. Not used in modern Japanese; replaced by words like 子孫 or 後継者.古こ文ぶん書しょには「胤いん裔えい」という語ごが血ち筋すじを引ひく者ものを指さして使つかわれている。In old documents, the word 胤裔 is used to refer to those who carry on a bloodline.