/kəˈlætərəl rɪˈleɪʃən/ – Phrase
Definition: 1. quan hệ họ hàng theo bàng hệ;
2. người bà con theo bàng hệ.
A more thorough explanation: Collateral relation refers to a family relationship that is not direct, such as a relationship between cousins or other relatives who are not in a direct line of descent.
Example: In the will, the testator left a bequest to his collateral relatives, such as his cousins and nieces.