protreptic /prō-trepˈtik/

1. Exhorting or encouraging
2. Didactic

An exhortation

• helical
• helically
• helicase
• helices
• Helichrysum
• Helicidae
• helicobacter pylori
• helicograph
• helicographs
• helicoid
• helicoidal
• helicoid cyme
• helicoid cymes
• helicon
• heliconia
• Heliconian
• heliconias
• helicons
• helicopter
• helicoptered
• helicoptering
• helicopters
• helicopter view
• helictite
• helictites