explanatory
ɪkˈsplanət(ə)ri
ɛkˈsplanət(ə)ri
adjective
serving to explain something.
explanatory notes
explaining,descriptive,describing,illustrative,illuminative,elucidative,elucidatory,explicative,evaluative,interpretive,expository,revelatory,by way of explanation,prefatory,exegetic,hermeneutic