A.anything double: hence of the parallel streams of the 'milky way', Arist.Mete. 346a24; of 'doubled' position of foetus at birth, Sor.2.60, Philum. ap.Aët.16.23.
II. folded paper: hence, letter of recommendation, esp. passport, Cic.Att.10.17.4, Fam.6.12.3; later, order enabling a traveller to use the public post, Plu.Galb.8, OGI665.25 (Egypt, i A. D.), etc.; receipt for payment of licences or taxes, PAmh.2.92 (ii A. D.), etc.
2. duplicate, counterpart, CIG3276 (Smyrna).
III. double pot for boiling unguents, etc., Dsc.2.77, Crito ap.Gal.13.37.