lineal(a = adj.all)direct - in a straight unbroken line of descent from parent to child; "a direct descendant of the king"; "direct heredity"; "lineal ancestors"; "lineal heirs"
Descending in a direct line from an ancestor; hereditary; derived from ancestors; -- opposed to collateral; as, a lineal descent or a lineal descendant. [1913 Webster]
Inheriting by direct descent; having the right by direct descent to succeed (to). [1913 Webster]
Composed of lines; delineated; as, lineal designs. [1913 Webster]
In the direction of a line; of or pertaining to a line; measured on, or ascertained by, a line; linear; as, lineal magnitude. [1913 Webster]
Lineal measure, the measure of length; -- usually written linear measure.