allomerism

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Consistency in crystalline form with variation in chemical composition.

from The Century Dictionary.

• noun In chem., the property of retaining a constant crystalline form while the chemical constituents present or their proportions vary.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) Variability in chemical constitution without variation in crystalline form.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry Variability in chemical composition without variation in crystalline form.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun (chemistry) variability in chemical composition without variation in crystalline form