A more thorough explanation:

Obliquus means indirect or collateral in terms of a line of descent. It comes from the Latin word "oblique".

• My cousin is my obliquus relative because we share a common ancestor, but we are not directly related.
• The obliquus relationship between the two families was discovered through genealogical research.

These examples show how obliquus refers to a relationship that is not direct, but rather indirect or collateral. It is used to describe a connection between two people or families that share a common ancestor, but are not directly related.