| derivational | (adj) characterized by inflections indicating a semantic relation between a word and its base, Ant. inflectional, Example: the morphological relation between `sing' and `singer' and `song' is derivational |
| derivational morphology | (n) the part of grammar that deals with the derivations of words |
| Derivational | a. Relating to derivation. Earle. [ 1913 Webster ] |