Definify.com
Webster 1913 Edition
Episodical
{ 
Epˊi-so′dic
,Epˊi-so′dic-al
, }Adj.
 [Cf. F. 
épisodique
. See Episode
.] Of or pertaining to an episode; adventitious. 
– Epˊi-so′dic-al-ly
, adv.
Such a figure as Jacob Brattle, purely 
episodical 
though it be, is an excellent English portrait. H. James.