noun
the phenomenon of an element existing in two or more physical forms
• Syn: ↑allotropy
• Derivationally related forms: ↑allotropical, ↑allotropic, ↑allotropical (for: ↑allotropy), ↑allotropic (for: ↑allotropy)
• Hypernyms: ↑chemical phenomenon
Useful english dictionary. 2012.