Velum, and much more commonly its derivative velamen, denoted the veil worn by women (Prudent. c. Symm. ii.147). That worn by a bride was specifically called flammeum [MATRIMONIUM, p743a]: another special term was RICA. Greek women, when they went abroad, often covered their heads with the shawl [PEPLUM], thus making it serve the purpose of a veil. But they also used a proper head-dress, called kaluptra (Apollod. ii.6 §6; Aelian, V.H. vii.9), which besides serving to veil their countenances, whenever they desired it, was graceful and ornamental, and was therefore attributed to Venus (Paus. iii.15 §8; Brunck, Anal. ii.45) and Pandora (Hes. Theog. 573). The veil of Ilione, the eldest daughter of Priam, was one of the seven objects preserved at Rome as pledges of the permanency of its power (Serv. in Virg. Aen. vii.188).

William Smith, A Dictionary of Greek and Roman Antiquities (London: John Murray, 1875), p 1186.