Prolusion

• (n.) A trial before the principal performance; a prelude; hence, an introductory essay or exercise.
Found on http://thinkexist.com/dictionary/meaning/prolusion/

prolusion

(from the article `Milton, John`) ...College,` perhaps because of his fair complexion, delicate features, and auburn hair. Nonetheless, Milton excelled academically. At Cambridge he ...
Found on http://www.britannica.com/eb/a-z/p/120

Prolusion

Pro·lu'sion noun [ Latin prolusio , from proludere to prelude; pro before + ludere to play: confer French prolusion , Italian prolusione .] A trial before the principal performance; a prelude; hence, an introductory essay or exercise. 'Domestic prolusions...
Found on http://www.encyclo.co.uk/webster/P/172

prolusion

preliminary performance, activity or display
Found on http://phrontistery.info/p.html

prolusion

prolusion 1. A display introductory to a game, performance, or entertainment; a prelude, preliminary essay or attempt. 2. A literary production intended as a preliminary dissertation on a subject which the author intends to treat more fully; a preliminary essay or article; a slight literary production. ...
Found on http://www.wordinfo.info/words/index/info/view_unit/1214/4
No exact match found