Opérculo, opérculas, operculâre. Colum. To couer a vessell.
Lewis and Short: Latin dictionary
ŏpercŭlo, āvi, ātum, 1, v. a. [operculum], to furnish or cover with a lid, to cover (post-Aug.): dolia, Col. 12, 30, 1: vasa, id. 12, 15, 2: operculati favi, id. 11, 2, 50; 57.
ŏpercŭlum, i, n. [operio], a cover, covering, lid (class.): quibus operibantur operimenta et pallia opercula dixerunt, Varr. L. L. 5, 167 Müll.: aspera arteria tegitur quasi quodam operculo, Cic. N. D. 2, 54, 136; Col. 8, 8, 7: sorba in urceolos picatos adicito et opercula picata imponito, id. 12, 16, 4: ambulatorium,