pseudomorph

[ soo-duh-mawrf ]
/ ˈsu dəˌmɔrf /

noun

an irregular or unclassifiable form.
a mineral having the outward appearance of another mineral that it has replaced by chemical action.

Origin of pseudomorph

First recorded in 1840–50; pseudo- + -morph

OTHER WORDS FROM pseudomorph

pseu·do·mor·phic, pseu·do·mor·phous, adjectivepseu·do·mor·phism, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for pseudomorphism

pseudomorph
/ (ˈsjuːdəʊˌmɔːf) /

noun

a mineral that has an uncharacteristic crystalline form as a result of assuming the shape of another mineral that it has replaced

Derived forms of pseudomorph

pseudomorphic or pseudomorphous, adjectivepseudomorphism, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012