LIN'EAL, adjective [Latin linealis, from linea, line.] 1. Composed of lines; delineated; as lineal designs. 2. In a direct line from an ancestor; as lineal descent; lineal succession. 3. Hereditary; derived from ancestors. 4. Allied by direct descent. For only you are lineal to the throne. 5. In the direction of a line; as lineal measure. Lineal measure, the measure of length.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI