exemplar

Short definition from Wiktionary

Noun

1. 1
   Something fit to be imitated; an ideal, a worthy model or role model: a desirable example.
2. 2
   Something typical or representative; an example that typifies its class.
3. 3
   A pattern after which others should be made; an archetype.
4. 4
   A well-known use of a scientific theory.
5. 5
   A manuscript used by a scribe to make a handwritten copy; the original document to be reproduced in a copy machine.
6. 6
   A copy of a book or piece of writing.

Adjective

1. 1
   Exemplary.