ACUS (belonh, beloniV, rafiV), a needle, a pin. The annexed figures of needles and pins, chiefly taken from originals in bronze, vary in length from an inch and a half to about eight inches.

Pins were made not only of metal, but also of wood, bone, and ivory. They were used for the same purposes as with us, and also in dressing the hair (Mart. xiv.24). The mode of plaiting the hair, and then fastening it with a pin or needle, is shown in one annexed figure of a female head, taken from a marble group which was found at Apt, in the south of France (Montfaucon, Ant. Exp. Suppl. iii.3). This fashion has been continued to our own times by the females of Italy, and of some parts of Germany, as for instance, in the neighbourhood of Coblenz.

William Smith, A Dictionary of Greek and Roman Antiquities, John Murray, London, 1875. p 13-14.