Mergus, mergi, m. g. Varro. A name common to sundrie birdes of the sea, as a Cormorant, a Gull, and certaine other: but most commonly a Cormorant.Aprici mergi.Virg.Celeres mergi.Virg. Mergus, in vite. Columel. A braunch turned bowise and hauing the toppe set into the ground.
Lewis and Short: Latin dictionary
mergus, i, m. [mergo]. I.A diver, a kind of water-fowl, Varr. L. L. 5, 78 Müll.: praesagiunt pluviam mergi, Plin. 18, 35, 87, 362: mergi maria fugientes, id. ib.; Ov. M. 8, 625; cf.: aequor amat; nomenque tenet, quia mergitur illo, id. ib. 11, 795; Hor. Epod. 10, 22.—Jestingly: mergus agrarius, of one who is eager to possess lands, Capitol. Pertin. 9.—II.A vine-layer, Col. 4, 15, 1; Pall. 3, 16, 1.