• Webster's Revised Unabridged Dictionary
    • Ferruginous Partaking of iron; containing particles of iron.
    • Ferruginous Resembling iron rust in appearance or color; brownish red, or yellowish red.
    • ***
Century Dictionary and Cyclopedia
    • ferruginous Of the color of iron-rust; light reddish brown.
    • ferruginous Of the nature of or containing iron.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Ferruginous fer-rōō′jin-us of the colour of iron-rust impregnated with iron
    • ***


Webster's Revised Unabridged Dictionary
L. ferruginus, ferrugineus, fr. ferrugo, -ginis, iron rust: cf. F. ferrugineux,. See Ferrugo
Chambers's Twentieth Century Dictionary
L. ferrugineusferrugo, -inem, iron-rust—ferrum, iron.


In literature:

We soon arrived at a ridge of ferruginous sandstone, whereof the strike tended S. S. W. and the dip was to the eastward.
"Journal of an Expedition into the Interior of Tropical Australia" by Thomas Mitchell
Leaves oblong-lanceolate, slightly ferruginous beneath.
"Hardy Ornamental Flowering Trees and Shrubs" by A. D. Webster
The rocks are of sandstone, in nearly horizontal strata, coated with a crust of crystallized quartz and coloured by a ferruginous oxide.
"Narrative of a Survey of the Intertropical and Western Coasts of Australia" by Phillip Parker King
Several blast furnaces are at work here, the soil being ferruginous, as is shown by the word "Kizil," which means red.
"The Adventures of a Special Correspondent" by Jules Verne
A concretion of rounded quartz pebbles, cemented by ferruginous matter, apparently of recent formation.
"Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]" by Phillip Parker King
Vide Mr. Darwin on "superficial ferrugineous beds" Geology of Volcanic Islands page 143.
"Discoveries in Australia, Volume 1." by J Lort Stokes
The shore, composed of black broken rock of ferruginous appearance, shows traces of violent subterranean eruption.
"Celebrated Travels and Travellers" by Jules Verne
The =spores= are ferruginous brown, elliptical.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc." by George Francis Atkinson
In their upper courses all the southern affluents of the Ghazal flow across a plateau of ferruginous laterite, their valleys having steep banks.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2" by Various
There are sandstones, shales, and grits, with ferruginous joints.
"British Borneo" by W. H. Treacher

In news:

Ferruginous Hawk in the Raptor Free Flight Exhibition.
Forum member Dana Middleton of Mandan, North Dakota, took this remarkable photo of a juvenile Ferruginous Hawk.
Other prime attractions include Snowy Owl, Greater Prairie-Chicken, Ferruginous Hawk, and nesting Burrowing Owls.
Explorer file photo, The catcus ferruginous pygmy -owl, Tucson shovel-nosed snake (above) and Southwestern willow flycatcher are among the 13 species Marana seeks to protect with its habitat conservation plan.