What's the adjective for explanationism? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs explain and explicate which may be used as adjectives within certain contexts.
“This article presents definitions and explanative examples for a collection of key metadata vocabulary terms.”
“Hermann Ebbinghaus wrote an extended review which claimed that Dilthey still relies on hypotheses and that the differences between explanative and descriptive psychologies are minimal.”
“These laws of metamorphosis are conceived as explanative to the extent that they appeal to an overall acquired psychic nexus as a definitive context.”