lăcūno — Lewis & Short
lăcūno, āvi, ātum, 1, v. a.lacuna. *
I To hollow out, to fret or pit:
lacunati tori,Plin. 15, 10, 9, § 35.—
II To panel like a lacunar:
summa lacunabant alterno murice conchae,Ov. M. 8, 564.