also: せいてつ
noun
nephews and nieces
Collective term for one's nephews and nieces. Often used in formal or written contexts, such as family registers or legal documents.
甥姪が遊びに来た。
My nephews and nieces came to visit.
相続人には甥姪も含まれる場合がある。
In some cases, nephews and nieces are also included as heirs.
Compound of 甥 (nephew) and 姪 (niece). The reading おいめい combines the kun'yomi of each character, while せいてつ is the on'yomi reading.