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The definition of prototype

3 Definitions of: prototype

1. noun, one of the first units manufactured of a product, which is tested so that the design can be changed if necessary before the product is manufactured commercially
2. noun, a person or thing that serves as an example of a type
3. noun, biology the ancestral or primitive form of a species or other group; an archetype
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Synonyms:	model, original, precedent, first, example, standard, paradigm, archetype, mock-up

From Collins