Origin of extemporal
Examples from the Web for extemporal
That very laborious investigator has an article on "Extemporal Plays and Plots," iii., 393.A History of Pantomime|R. J. Broadbent
These remind us of the extemporal comedy and the pantomimical characters of Italy, invented by actors of genius.
Men of great genius had a passion for performing in these extemporal comedies.
In such cases the "extemporal wit," or gagging of the comic actors, was indispensably necessary.A Book of the Play|Dutton Cook
But there were probably some secret aids in this singular art of Extemporal Comedy which the pride of the artist has concealed.