ἐπιπρόςθησις

A. being before, covering, Thphr. Vent. 30; esp. of eclipses or occultations, Arist. Cael. 293b22, Procl. Hyp. 5.15, etc.; superposition of colour, Arist. Mete. 342b9(pl.); of objects that serve as cover, Plb. 3.71.3(pl.).