oesypum, i, n., = οἴσυπος,
the greasy sweat and dirt of unwashed wool , Plin. 29, 2, 10, § 35; cf. id. 29, 6, 36, § 112; 30, 4, 10, § 28.—Used as a cosmetic by the Roman ladies, Ov. A. A. 3, 213; id. R. Am. 354.
oesypum ī, n , οἴσυπος, the refuse of wool, wool-washings (a cosmetic), O. ...
An Elementary Latin Dictionary