|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|1.||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.||a person or thing that serves as an example of a type|
|3.||biology the ancestral or primitive form of a species or other group; an archetype|
prototype pro·to·type (prō'tə-tīp')
A primitive or ancestral form or species.