non-lineal

adjective

1. being in the direct line, as a descendant or ancestor, or in a direct line, as descent or succession.
2. of or transmitted by lineal descent.
3. linear.

adjective

1. being in a direct line of descent from an ancestor
2. of, involving, or derived from direct descent
3. a less common word for linear

adj.late 14c., from Old French lineal (14c.), from Late Latin linealis “pertaining to a line,” from linea (see line (n.)). Related: Lineally.