'Derivational' definitions:
Definition of 'derivational'
From: WordNet
adjective
Characterized by inflections indicating a semantic relation between a word and its base; "the morphological relation between `sing' and `singer' and `song' is derivational" [ant: inflectional]
Definition of 'Derivational'
From: GCIDE
- Derivational \Der`i*va"tion*al\, a. Relating to derivation. --Earle. [1913 Webster]