へいこう 平行いとこ LinksSentence search for 平行いとこSentence search for へいこういとこSentence search for 平行従兄弟Kanji details for 平 and 行Edit in JMdict Noun1. parallel cousins; ortho-cousinsOther forms平行従兄弟 【へいこういとこ】 Discussions Log in to talk about this word.