Line-al, a.

(124), a. [Lat. linealis, from linea, line, q. v.; Fr. linéal, Sp. lineal, It. lineale.]

1. Composed of lines; delineated; as, lineal designs. Walton.
2. Descending in a direct line from an ancestor; hereditary; derived from ancestors; as, lineal descent; lineal succession.

And for the same his lineal race In darkness found a dwelling-place. Byron. 3. Allied by direct descent. For only you are lineal to the throne. Dryden. 4. In the direction of a line; pertaining to, or ascertained by, a line or lines; as, lineal magnitude. Lineal measure, the measure of length;—usually written linear measure.