ferrūgo (noun F) : ferrum; like aerugo from aes
* Iron-rust (syn.: aerugo, rubigo).
* Prop., Plin. 23, 8, 79, § 151.
* Transf., the color of iron-rust, a darkred, dark-chestnut, a dusky color: nuclei vestiti aliā ferruginis tunicā,Plin. 15, 10, 9, § 35; also sea-green: viridis ferrugine barba,Ov. M. 13, 960: excutit obscurā tinctas ferrugine habenas,id. ib. 5, 404; 15, 789: sol caput obscurā nitidum ferrugine texit,gloom,Verg. G. 1, 467: maesta obtenta Ditis ferrugine regna,id. Cul. 273: pectus manu ferrugine tincta Tangit,Ov. M. 2, 798: pictus acu chlamydem et ferrugine clarus Hiberā,purple,Verg. A. 9, 582; cf.: peregrinā ferrugine clarus et ostro,id. ib. 11, 772: violas ferrugine pingit,Claud. Rapt. Pros. 2, 93.—*
* Trop., envy (cf. aerugo): animusque mala ferrugine purus, Auct. Pan. ad Pis. 95.

s. TLL