lineal consanguinity

Lineal consanguinity is the blood relationship among persons where one is a direct descendant or ascendant of the other. It is the relation in a direct line, such as between a father, son, and grandson. 

Lineal consanguinity can either be downward in a direct descending line – as in son, grandson, and great grandson or be upward in a direct ascending line – as in son, father, and grandfather. 

See also: Consanguinity; Collateral consanguinity 

[Last reviewed in July of 2021 by the Wex Definitions Team]

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