cȳcnēus

a, um, adj.
I. Of or belonging to a swan, swan's-: tamquam cycnea vox et oratio, Cic. de Or. 3, 2, 6: plumae, Ov. Tr. 4, 8, 1.—
II. Cȳcnēa (al. Cygnaea) Specula, a hill near Brixia, now still Cigneo, Cat. 67, 32.
Lewis & Short
A Latin Dictionary, 1879
An open-access project