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

• systematically
• systematic desensitization
• systematician
• systematicians
• systematics
• systematisation
• systematise
• systematised
• systematiser
• systematisers
• systematises
• systematising
• systematism
• systematisms
• systematist
• systematists
• systematization
• systematize
• systematized
• systematizer
• systematizers
• systematizes
• systematizing
• systematologies
• systematology