The Collaborative International Dictionary
Sermocination
Sermocination \Ser*moc`i*na"tion\, n. [L. sermocinatio. See
Sermon.]
The making of speeches or sermons; sermonizing. [Obs.]
--Peacham.
Douglas Harper's Etymology Dictionary
sermocination
1510s, "a talk," from Latin sermonationem (nominative sermonatio), noun of action from past participle stem of sermonari "talk, discourse, harangue," from sermo (see sermon). From 1753 in rhetoric, "a form of prosopopoeia in which the speaker, having addressed a real or imaginary hearer with a remark or especially a question, immediately answers for the hearer." Related: Sermocinator, agent noun; sermocinatrix "a female talker" (1620s).
Wiktionary
sermocination
n. (context obsolete English) The making of speeches or sermons; sermonize.