prolusion /prə-, prō-looˈzhən or -lūˈ/

1. A preliminary performance, activity or display
2. An essay preparatory to a more solid treatise

proluˈsory /-sə-ri/ adjective

• hollo
• holloa
• holloed
• holloes
• holloing
• hollos
• hollow
• holloware
• hollowed
• hollower
• hollowest
• hollow-eyed
• hollow-ground
• hollow-ground slide
• hollow-ground slides
• hollow-hearted
• hollowing
• hollowly
• hollowness
• hollownesses
• hollows
• hollow-ware
• holly
• holly-fern
• holly-ferns