delta, ae, f. or indecl. n., = δέλτα,
I the fourth letter of the Greek alphabet, delta , Δ: non formam at vocem deltae gero Romuleum D, Aus. Idyll. de lit. monos. 14; so (but with gender undetermined) Mel. 2, 7, 14.—
II Meton.,
Delta indecl. n., Δέλτα, nom. prop., the Delta in Lower Egypt , Mel. 1, 9, 2; Plin. 5, 9, 9, § 48; 3, 16, 20, § 121; Auct. B. Alex. 27.