pseu·do·morph

[soo-duh-mawrf]
noun
1.
an irregular or unclassifiable form.
2.
a mineral having the outward appearance of another mineral that it has replaced by chemical action.

Origin:
1840–50; pseudo- + -morph

pseu·do·mor·phic, pseu·do·mor·phous, adjective
pseu·do·mor·phism, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
pseudomorph (ˈsjuːdəʊˌmɔːf) [Click for IPA pronunciation guide]
 
n
a mineral that has an uncharacteristic crystalline form as a result of assuming the shape of another mineral that it has replaced
 
pseudo'morphic
 
adj
 
pseudo'morphous
 
adj
 
pseudo'morphism
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Pseudomorph is always a great word to know.
So is gobo. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
Encyclopedia Britannica
Encyclopedia

pseudomorph

mineral formed by chemical or structural change of another substance, though retaining its original external shape. Although pseudomorphs give the appearance of being crystalline, they are commonly granular and waxy internally and have no regular cleavage; those that are crystalline have optical properties different from those required by their outward form

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The serpentine occurs typically in the form of a pseudomorph after diallage.
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