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

• test flights
• test-flown
• test-fly
• test-flying
• Testicardines
• testicle
• testicles
• testicular
• testiculate
• testiculated
• testier
• testiest
• testificate
• testificates
• testification
• testifications
• testificator
• testificators
• testificatory
• testified
• testifier
• testifiers
• testifies
• testify
• testifying