15 GCA § 809: Lineal Consanguinity Defined.

Lineal consanguinity, or the direct line of consanguinity, is the relationship between persons one of whom is a descendant of the other. The direct line of consanguinity is divided into a direct line descending, which connects a person with those who descend from such person, and a direct line ascending, which connects a person with those from whom such person descends. In the direct line there are as many degrees as there are generations. Thus a child is, with regard to such child's parents, in the first degree; a grandchild, with regard to such grandchild's grandparent, in the second degree; and vice-versa as to the parent and grandparent with regard to their respective children and grandchildren.