1. Serving or intended to explain or make clear
   "explanatory notes"; "an explanatory paragraph"

See also: explain, informative, instructive

• principal
• principal axis
• principal diagonal
• principal investigator
• principal sum
• principality
• Principality of Andorra
• Principality of Liechtenstein
• Principality of Monaco
• principally
• principalship
• principate
• Principe
• Principen
• principle
• principle of equivalence
• principle of liquid displacement
• principle of parsimony
• principle of relativity
• principle of superposition
• principled
• Prinia
• Prinival
• prink
• print