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1. A false, deceptive, or irregular form.
2. A mineral that has the crystalline form of another mineral rather than the form normally characteristic of its own composition.

pseu′do·mor′phic, pseu′do·mor′phous adj.
pseu′do·mor′phism n.
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) a mineral that has an uncharacteristic crystalline form as a result of assuming the shape of another mineral that it has replaced
ˌpseudoˈmorphic, ˌpseudoˈmorphous adj
ˌpseudoˈmorphism n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈsu dəˌmɔrf)

1. an irregular or unclassifiable form.
2. a mineral having the outward appearance of another mineral that it has replaced.
pseu`do•mor′phic, pseu`do•mor′phous, adj.
pseu`do•mor′phism, n.
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 ?
Subsequently, nyerereite is highly unstable when it react and contact with the surface, at that time it creates pseudomorphs. On the other side, when it gets hydrated and cools down nyerereite transform in pirssonite that makes a chemical formula of Na2Ca(CO3)2*2(H2O).
Airborne particles in smoke from forest fires include pseudomorphs of CaOx in the form of CaC[O.sub.3] and their persistence in soil as CaC[O.sub.3] will depend on the chemical and biological attributes therein (Hoyas et al.
Foster (1981) determined that muscovite and biotite pseudomorphs after staurolite formed as a result of sillimanite nucleation that sets up chemical potential gradients between the growing sillimanite, pre-existing staurolite, and the rock matrix of biotite, muscovite, plagioclase, quartz, ilmenite, and garnet.
In most cases the hornblende is completely altered to chlorite and epidote and pseudomorphs after hornblende are well noticed.
Approximately 40 kg of rough material were recovered from a silicified zone of the deposit, which also contained chalcedony pseudomorphs after barite, calcite and other minerals.
The mineral assemblage includes clinopyroxene, plagioclase, opaque minerals, and smectites (probably pseudomorphs after olivine).
Later during periods of fluvial, more oxidizing conditions, they were oxidized to goethite-hematite pseudomorphs (Fig.
The expanded study of textile imprints and pseudomorphs also contributes to our understanding of ancient textiles, as do new analytical methods and scientific analyses.
Actually, in my next lecture I plan to show "Map" upside down alongside Cezanne's hat and "Mont Sainte-Victoire," partly because I've come to believe over time that there are no pseudomorphs in visual art.
Iron oxide pseudomorphs after chalcopyrite make Emu Plain an exciting drill target.