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Containing nickel, especially of valence 2.
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.


(Chemistry) of or containing nickel, esp in the divalent state
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈnɪk ə ləs)

containing bivalent nickel.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Nickelous, appealed from the Northern District of Iowa,Benton, J.
Some trace elements have potential to expand the lattice parameters of the synthetic apatite crystal cell along the a-axis such as ferrous (Fe2+), ferric (Fe3+), strontium (Sr2+) and zinc ions (Zn2+) (molar fraction >10%) whereas it shrinks with silicate (SiO44-), carbonate (CO32-), magnesium (Mg2+), Zn2+ (molar fraction < 10%) and titanium ions (Ti4+).SiO44-, CO32-, Zn2+, Fe2+, Fe3+ and strontium ions (Sr2+) can increase the lattice parameters along the c-axis, decreased by Mg2+, nickelous (Ni2+), chromic (Cr3+), cobaltous (Co2+) and Ti4+.
Ammonium fluoride, nickelous sulfate hexahydate were purchased from Guoyao Chemical Company (Shanghai, China).