Also found in: Medical.
1. A substance that occurs in three distinct crystalline forms.
2. One of the crystalline forms in which a trimorphic substance occurs.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Geological Science) a substance, esp a mineral, that exists in three distinct forms
2. (Geological Science) any of the forms in which such a structure exists
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a substance existing in three structurally distinct forms; a trimorphous substance.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.