allotrope
/ˈæl.ə.troʊp/
noun
- One of two or more different physical forms of a chemical element. For example, carbon can exist as diamond or graphite, which are allotropes of carbon.
- Scientists discovered a new allotrope of phosphorus that is highly stable.
- Oxygen has two common allotropes: regular oxygen gas and ozone.
- Diamond and graphite are both allotropes of carbon, but they look very different.