Palmipedâlis, & hoc palmipedâle, pen. prod. Colu. Of the measure of a foote and an hand bredth: a foote and an halfe.
Lewis and Short: Latin dictionary
palmĭpĕdālis, e, adj. [palmipes], a foot and a palm in height, breadth, etc.: limen altum palmipedale, Varr. R. R. 2, 4, 14: malleolus, Col. 3, 19, 1: cardines, Vitr. 10, 20.