- Each of two or more different physical forms in which an element can exist. Graphite, charcoal, and diamond are all allotropes of carbon.More example sentences
- Two allotropes of the element exist, accounting for the slight variation in densities.
- Each of these allotropes of phosphorous also has its own subset of forms.
- A third allotrope occurs as an amorphous brown powder with a density of 2.350 grams per cubic centimeter.
late 19th century: back-formation from allotropy.
More definitions of allotropeDefinition of allotrope in:
- The US English dictionary