a. [f. L. ferrūgine-us (f. ferrūgin-em iron rust) + -OUS.] = FERRUGINOUS in all senses.
1663. Bullokar, Ferrugineous, rusty, of an iron color.
1671. J. Webster, Metallogr., xxviii. 350. It [Loadstone] is a hard Stone, ferrugineous, or irony, and blackish, which draweth or rejecteth Iron, or another Loadstone, and sheweth the quarters of the World.
1691. Ray, Creation (1714), 87. Hence they [Waters] are Cold, Hot, Sweet, Stinking, Purgative, Diuretick, or Ferrugineous, Saline, Petrefying, Bituminose, Venenose, and of other Qualities.
1750. G. Hughes, Barbadoes, II. 55. There are also Stones taken out of the Sea, that are very hard and ponderous, containing, by their dusky ferrugineous Colour, probably much Iron, and by their Smell, when broken, much Sulphur.
1859. Farrar, J. Home, 108. A great odious slow-trailing barge looms into sight, nearly as broad as the river itself, black as the ferruginous ferryboat of Charon.
1882. The Garden, XXI. 1 April, 212/1. Rhododendron Falconeri … the unusual size of the leaves, which are are very ferrugineous beneath.
