penniform /ˈpɛnɪfɔːm/adjective 1noun 1forms 1 adjective1 •Feather-shaped.Penniform symbols were inscribed on the wall of the cave. noun1 •A symbol that is shaped like a feather.Even in the palaeolithic periods symbols abound such as cup markings, tectiforms, penniforms, groups of dots, rectangles, lattice designs, symbolic vulvas, and so on. — 1970 formspenniforms
