We introduce the new concept of an Arabic Derivational Chain Bank (CHAINBANK) to leverage the relationship between form and meaning in modeling Arabic derivational morphology. We constructed a knowledge graph network of abstract patterns and their derivational relations, and aligned it with the lemmas of the CAMELMORPH morphological analyzer database. This process produced chains of derived words’ lemmas linked to their correspond- ing lemma bases through derivational relations, encompassing 23,333 derivational connections. The CHAINBANK is publicly available.1