Also found in: Encyclopedia.


 (fə-rĭf′ər-əs, fĕ-)
Containing or yielding iron.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Minerals) producing or yielding iron; iron-bearing: a ferriferous rock.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(fəˈrɪf ər əs)

yielding iron.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Mentioned in ?
References in periodicals archive ?
Today, Vale doesn't have a dry stacking operation that can deal with the production quantity especially in a region with high rainfall indices, such as the Ferriferous four-side [1] in Minas Gerais.
[1] Ferriferous four-side refers to an area in the central region of Minas Gerais.
The top two highest ferriferous mineral element contents (3.39% and 3.14% [Fe.sub.2][O.sub.3]) in Table 2 are the main cause of obvious absorption valleys of 700 nm and 870 nm bands of carbonaceous shale (d) and bituminite (c) [27, 28].
Absorption band (nm) Major related interactive process 1 400, 430, 450, 490, [Fe.sup.2+] and [Fe.sup.3+] in 510, 520, 550 ferriferous minerals 2 700 [Fe.sup.3+] in ferriferous minerals 3 870 [Fe.sup.3+] in ferriferous minerals 4 1000-1100 [Fe.sup.2+] in ferriferous minerals 5 1400 OH- vibrations in clay minerals 6 1900 H2O vibrations in milky quartz 7 2200 Al-OH vibrations in clay minerals 8 2300-2500 Overtones and combinations of organic absorption groups No.
Using an initial mixture 60% Si[O.sub.2]: 15% [B.sub.2][O.sub.3]: 5% [Na.sub.2]O: 20% [Fe.sub.2][O.sub.3] (pointed out the molar percentages) we have prepared four types of ferriferous alkali borosilicate glasses.
Other potential minerals affecting the MS of the studied strata are ferriferous glauconite, iron ooids and ferroan dolomite.
(1984) and Delmont (1985) emphasised the association of celadonite with a black ferriferous saponite from veins developed in marine volcanic rocks.
The "Quadrilatero Ferrifero" (Ferriferous Quadrilateral) region is regarded as a conservation priority area with special biological importance that demands urgent scientific investigation, due to its plant and amphibian endemisms, richness of vertebrate species, and also because these ferruginous fields are a unique environment (Drummond et al., 2005).
Therefore on the next stage we have studied the morphology and magnetic properties of these ferriferous alkali borosilicate glasses and their convenience for preparation of magnetic porous glasses (MPG).