English
expositional
From exposition + -al.
A compound of exposition + -al
Proto-Indo-European *tḱey- ‘to cultivate’
…
Latin expōnō ‘to put forth’
Latin expositiō ‘exposition, exhibition’
Old French esposicion
Middle English exposicioun ‘the action of describing in writing’
English exposition
Today it means
adj Explained in clear terms, as in writing.
Language periods are conventional ranges, not dates for this word.
Etymograph / expositional