The Collaborative International Dictionary
Sermonical
Sermonic \Ser*mon"ic\, Sermonical \Ser*mon"ic*al\, a.
Like, or appropriate to, a sermon; grave and didactic. [R.]
``Conversation . . . satirical or sermonic.''
--Prof. Wilson.
``Sermonical style.''
--V. Knox.
Wiktionary
sermonical
a. sermonic