American Heritage® Dictionary of the English Language, Fourth Edition
- n. A false, deceptive, or irregular form.
- n. A mineral that has the crystalline form of another mineral rather than the form normally characteristic of its own composition.
Century Dictionary and Cyclopedia
- n. A deceptive, irregular, or false form; specifically, in mineralogy, a mineral having a definite form belonging, not to the substance of which it consists, but to some other substance which has wholly or partially disappeared. Sometimes quartz is found in the form of fluor-spar crystals, the fluor-spar having been changed by a process of substitution into quartz. Such crystals are pseudomorphs by substitution; another illustration is that of tinstone, cassiterite, after orthoclase feldspar. A more common and important class of pseudomorphs includes those formed by the chemical alteration of the original mineral: these are illustrated by pseudomorphs of native copper after the oxid cuprite, where there has been a simple loss of one ingredient, in this case oxygen; also, of gypsum after anhydrite, where the anhydrous calcium sulphate has been changed by assumption of water to the hydrous sulphate; or, still more important, where there has been a more or less complete exchange of constituents, as of the lead carbonate cerusite after the lead sulphid galena, or of serpentine after chrysolite, or of kaolin after feldspar, etc. Pseudomorphs are also formed by molecular change without change of chemical substance, as of calcite after aragonite, or rutile after brookite; these last are also called
paramorphs. (See paramorphism.) Pseudomorphs very commonly have a noncrystalline waxy structure, but this is not necessarily the case.
- n. geology, mineralogy A mineral that formed by replacement of an existing mineral (or organic matter) such that the new mineral has the appearance and dimensions of the original.
GNU Webster's 1913
- n. An irregular or deceptive form.
- n. (Crystallog.) A pseudomorphous crystal, such as a crystal consisting of quartz, but having the cubic form of fluor spar, the fluor crystal having been changed to quartz by a process of substitution.
- pseudo- (“false”) + -morph (“form”) (Wiktionary)
“It is then called a pseudomorph, which is a term applied to any mineral which, instead of having the form it should possess, shows the form of something which has altered its structure completely, and then disappeared.”
“So would you consider mineral replacement like a malachite pseudomorph after calcite to fit the preference to photographs that depict “invasive species.””
“It will help to mesh awarenesses with a human, Djana ¦ no terrified captive, no lickspittle turncoat, no sniveler about peace and brotherhood, no pseudomorph grown up among us apart from his own breed ¦ but one who has come to me freely, out of the depths of the commonalty that bred her, one who has known alike the glory and the tragedy of being human.”
“For instance: very often, in a certain cavity, fluorspar has existed originally, but, through some chemical means, has been slowly changed to quartz, so that, as crystals cannot be changed in shape, we find quartz existing -- undeniably quartz -- yet possessing the crystals of fluorspar; therefore the quartz becomes a pseudomorph, the condition being an example of what is termed pseudomorphism.”
“Hawksnest, over beyond, I noted, had its pseudomorph too; a newspaper proprietor of the type that hustles along with stolen ideas from one loud sink-or-swim enterprise to another, had bought the place outright; Redgrave was in the hands of brewers.”
“I conceive it as a mechanism set going by heat -- as a sort of active crystal with the capacity of giving rise to a great number of pseudomorphs; and I conceive that external conditions favour one or the other pseudomorph, but leave the fundamental mechanism untouched.”
“It'll make that pseudomorph page just sing , I'm sure.”
These user-created lists contain the word ‘pseudomorph’.
"Luciferous Logolepsy is a collection of over 9,000 obscure English words. Though the definition of an 'English' word might seem to be straightforward, it is not. There exist so many adopted, deriv...
confabulation, factitious disorder, Münchhausen by proxy, Münchausen syndrome, pseudologia fanta..., pseudology, fabrication, equivocation, dysmorphophobia, chicane, counterfactual, pseudograph and 13 more...
having, denoting, or relating to a specified form or character
purported or false; resembling or imitating
words that evoke magic, mystery, mayhem, magnificence or anything else that glimmers in the grass
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