sky-light

sky-light: expr. by words denoting a window: more exactly, *fenestra tecto indita, after Pl. Rud. 1, 1, 6: fenestrula, App. M. 9, p. 237, or fenestrella, Col.: lumen may also be used, Vitr. 5, 10, 5: cf. 6, 6, 6-7: the lights from above in the Roman catacombs are termed luminaria: Kr. gives *fenestra quae est in tecto.