#polymorphism.chemical_phenomenon__pleomorphism  (chemistry) the existence of different kinds of crystal of the same chemical compound
  supertype:  chemical_phenomenon  a natural phenomenon involving chemistry (as changes to atoms or molecules)
  subtype:  dimorphism.polymorphism  (chemistry) the property of certain substances that enables them to exist in two distinct crystalline forms

No statement uses or specializes polymorphism.chemical_phenomenon; click here to add one.