Subsidiary to or of lesser importance than a cardinal point, position, etc.; specifically designating the four points of the compass midway between the cardinal points, i.e. NE, SE, SW, and NW.

Located beneath the cardinal (hinge) area of a bivalved shell.

Located beneath a cardinal vein; specifically designating a vein which develops ventral and parallel to the posterior cardinal vein at one stage of the embryogenesis of the posterior (inferior) vena cava in many vertebrate embryos; of or relating to this vein.

A subcardinal vein.