English
illustrational
From illustration + -al.
Formed from illustration + -al
Old Latin *loustrom
…
Latin lūstrō ‘to purify via sacrifice’
Latin illūstrō ‘to illustrate’
Latin illūstrātiō ‘the action of lighting up, brightening’
Middle French illustration
English illustration
Today it means
adj Serving to illustrate.
Language periods are conventional ranges, not dates for this word.
Etymograph / illustrational