From Wiktionary, the free dictionary
From mini- + symphony.
minisymphony (plural minisymphonies)
- A short symphony.
2009 April 6, Anthony Tommasini, “Is That in Your Job Description, Maestro?”, in New York Times[1]:The humorous program began with Mr. Robertson’s droll conducting of “A Musical Joke,” Mozart’s intentionally clunky and satirical minisymphony.