In general, polymorphism describes multiple possible states for a single property (it is said to be polymorphic).
Polymorphism can be:
In materials science polymorphism is the ability of a solid material to exist in more than one form or crystal structure. Diamond, graphite and the Buckyball are examples of polymorphs of carbon. α-ferrite, austenite, and δ-ferrite are polymorphs of iron. When found in elemental solids the condition is also called allotropy.
In computer programming, polymorphism is a mechanism allowing a given function to have many different specifications, depending on the type(s) to which it is applied.
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Polymorphism in the language ML and its close relatives is predicative.
In these languages, subtyping polymorphism (sometimes referred to as dynamic polymorphism or dynamic typing) allows a function to be written to take an object of a certain type T, but also work correctly if passed an object that belongs to a type S that is a subtype of T (according to the Liskov substitution principle).
This type of polymorphism is common in object-oriented programming languages, many of which allow operators to be overloaded in a manner similar to functions (see operator overloading).
Polymorphism (computer science), a mechanism allowing a given function to have many different specifications, depending on the type(s) to which it is applied.
Polymorphism (materials science), the ability of a solid material to exist in more than one form or crystal structure.
Polymorphism (plant science), the ability of a plant to produce both quiescent and dormant seeds.
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