The Collaborative International Dictionary
Belletristical
Belletristic \Bel`le*tris"tic\, Belletristical
\Bel`le*tris"tic*al\, a.
Occupied with, or pertaining to, belles-lettres. ``An
unlearned, belletristic trifler.''
--M. Arnold.
Wiktionary
belletristical
a. (alternative form of belletristic English)