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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.


(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


(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.
References in periodicals archive ?
In fact, tiger's-eye is cited in many textbooks as a classic example of a pseudomorph, says Peter J.
They also have the ability to excrete an ink cloud, called a pseudomorph, which resembles a squid's shape.
The fourth supposed silk is a textile pseudomorph on an Etruscan ceramic urn from Chiusi in the Royal Ontario Museum, dated to the second-first centuries BC (Hayes 1977: 144).
Impersonating the Manuscript: Cross-Dressed Authors and Literary Pseudomorphs" analyzes how Spenser, Gascoigne, and Daniel each "reshaped and introduced a new authorial career by developing a literary pseudomorph that he could supersede" (250), and amply documents that "patterns of authorial emergence .
This cubic morphology of primary jarosite does not necessarily mean a pseudomorph transformation from pyrite, since they have the same crystal habit.
This evidence then raises the question of how much the fabric trapped in the brooch or as a pseudomorph can be taken to represent the actual layers of clothing worn by the buried people.
The first, an Etruscan bronze bowl in the Newark Museum (New Jersey, USA), contains pseudomorph remnants of a plain woven cloth adhering to a bronze bowl.
SEM analysis was conducted on the fragile ashy pseudomorphs of macrofossils of grasses which remained visible inside the charred dung remains (Figure 2e).
The expanded study of textile imprints and pseudomorphs also contributes to our understanding of ancient textiles, as do new analytical methods and scientific analyses.
Iron oxide pseudomorphs after chalcopyrite make Emu Plain an exciting drill target.