parallel cousins; ortho-cousins
Anthropological term for children of a parent's same-sex sibling (e.g., father's brother's children or mother's sister's children). Contrasts with 交叉いとこ (cross cousins).
父の弟の子供は、私にとって平行いとこにあたる。
My father's younger brother's children are my parallel cousins.
平行いとこと交叉いとこの区別は、親族構造の研究で重要だ。
The distinction between parallel cousins and cross cousins is important in the study of kinship structures.