One of the mysteries of the English language finally explained.
In the feet of various arthropods, especially insects and mites: a membraneous pad or lobe located between the tarsal claws, assisting in gripping surfaces.
Mid 19th century. From scientific Latin arolium, of uncertain origin; perhaps from post-classical Latin arolius, arrolius roll of cloth from Spanish arrollar to roll, earlier form of arrojar + classical Latin -ius, suffix chiefly forming adjectives.
In this article we explore how to impress employers with a spot-on CV.