protreptic
adjective
[ prəʊˈtrɛptɪk ]
• intended to persuade or instruct.
• "the dialogues have a protreptic function"
protreptic
noun
• a piece of writing or speech intended to persuade or instruct.
• "ancient philosophical protreptics"
Origin:
mid 17th century: via late Latin from Greek protreptikos ‘instructive’, from pro- ‘before’ + trepein ‘to turn’.
