†† leuca (leuga), ae, f. [a Celtic word, whence the Fr. lieue], a Gallic mile of 1500 Roman paces, a league: Λεύκη μέτρον τι Γαλακτικόν, Hesych.: leuca finitur passibus mille quingentis, Isid. Orig. 15, 16: cum et Latini mille passus vocent, et Galli leucas, et Persae parasangas, et rastas universa Germania, Hier. in Joel, 3, 18: exinde non millenis passibus sed leugis itinera metiuntur, Amm. 15, 11, 17: quarta leuga signabatur et decima, id est unum et viginti millia passuum, id. 16, 12, 8; cf. also Inscr. Orell. 1018; 1019; 5063.