"prototype : An original form or object which is a basis for other forms or objects (particularly..."

“prototype : An original form or object which is a basis for other forms or objects (particularly manufactured items), or for its generalizations and models.
An early sample or model built to test a concept or process.
(computing) A declaration of a function that specifies the name, return type, and parameters, but none of the body or actual code.
(semantics) An instance of a category or a concept that combines its most representative attributes.”

- https://en.wiktionary.org/wiki/prototype#English

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