1 in a straight unbroken line of descent from parent to child; "lineal ancestors"; "lineal heirs"; "a direct descendant of the king"; "direct heredity" [syn: direct] [ant: collateral]
2 arranged in a line
- Family. Of a family relationship that includes mothers, fathers, sisters, brothers, daughters, and sons, etc. as opposed to collateral.
after, arrowlike, attendant, cadet, catenary, clannish, consecutive, dead straight, diphyletic, direct, ensuing, ethnic, even, family, flat, following, genealogical, genetic, gentile, gentilic, horizontal, in a line, junior, later, level, linear, national, ordinal, phyletic, phylogenetic, posterior, progressive, puisne, racial, rectilineal, rectilinear, right, ruler-straight, sequent, sequential, serial, seriate, smooth, straight, straight-cut, straight-front, straight-side, streamlined, subsequent, succeeding, successional, successive, totemic, tribal, true, unbending, unbent, unbowed, unbroken, uncurved, undeflected, undeviating, undistorted, uninterrupted, unswerving, unturned, upright, vertical, younger