·adj Composed of lines; delineated; as, lineal designs.
II. Lineal ·adj Inheriting by direct descent; having the right by direct descent to succeed (to).
III. Lineal ·adj In the direction of a line; of or pertaining to a line; measured on, or ascertained by, a line; linear; as, lineal magnitude.
IV. Lineal ·adj Descending in a direct line from an ancestor; hereditary; derived from ancestors;
— opposed to collateral; as, a lineal descent or a lineal descendant.