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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 ?
Extremely large cordierite porphyroblasts up to 10 cm in length now pseudomorphed by pinite/sericite are present in muscovite-rich rocks from the extreme southwestern part end of the study area.
The first mode of formation involves direct inheritance from the underlying sandstone, whereby primary minerals and volcanic glass fragments have been pseudomorphed (i.
The veins exhibit high-level epithermal-low-sulphidation style mineralization characterized by banded chalcedonic and open-space silica plus pseudomorphed quartz after barite textures.