Hypertext Webster Gateway: "derivational"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Derivational \Der`i*va"tion*al\, a.
Relating to derivation. --Earle.
From WordNet (r) 1.7 (wn)
derivational
adj : 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}]
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