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Webster 1913 Edition

Adj.

[Gr. [GREEK], fr. [GREEK] to turn forward, to urge on.]

Adapted to persuade; hortatory; persuasive.

[Obs.]

Bp. Ward.

Adj.

[Gr. to exhort; and to turn.] Hortatory; suasory; intended or adapted to persuade. [Little used.]

protreptical ‎(comparative more protreptical, superlative most protreptical)

(obsolete) Adapted to persuade; hortatory; persuasive.
- Bishop Ward
  The means used to this purpose are partly didactical, and partly protreptical; demonstrating the truth of the gospel, and then urging the professors of those truths to be stedfast^[sic] in the faith, and to beware of infidelity.