Sections of major orchestral works which are written for a particular instrument are called excerpts.
When performing a major piece in an orchestra, you may have to count measures rest for many minutes and eventually get to the “meat” of the part far down the road. These short, yet vitally important fragments of a composition can be extracted for easier viewing and practicing and this collection is call an Orchestral Excerpt Book.
A very helpful post on the Internet can be found at this location..
Orchestral Excerpts for Trumpet
Not only are you able to print off the musical example, but you can also listen to the excerpt in the context of the full composition.
For all you would be orchestra players, enjoy this service and for those who do not have orchestral leanings, this might be good for you also.
