Lewis Short
exemplārĭum (noun N) : exemplar, post-class for exemplar (cf. Lachm. ad Lucr. p. 82).
* A copy: binae tabulae testamenti eodem tempore exemplarii causa scriptae,Dig. 31, 47; Hier. adv. Helv. 8.
* A model, pattern, original, Arn. 6, 198; Schol. Lucan. 9, 563.
Charlton T. Lewis, Charles Short, A Latin Dictionary