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a. The act or process of deriving.
b. The state or fact of being derived; origination: a custom of recent derivation.
c. Something derived; a derivative.
2. The form or source from which something is derived; an origin.
3. Linguistics
a. The historical origin and development of a word; an etymology.
b. The process by which words are formed from existing words or bases by adding affixes, as singer from sing or undo from do, by changing the shape of the word or base, as song from sing, or by adding an affix and changing the pronunciation of the word or base, as electricity from electric.
c. In generative linguistics, the generation of a linguistic structure through an ordered or partially ordered series of operations on other structures, such as the creation of a surface structure from a deep structure, or of a complex word from its morphological components.
d. The formal description of the process of such generation.
4. Logic & Mathematics A logical or mathematical process indicating through a sequence of statements that a result such as a theorem or a formula necessarily follows from the initial assumptions.

der′i·va′tion·al adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.derivational - characterized by inflections indicating a semantic relation between a word and its base; "the morphological relation between `sing' and `singer' and `song' is derivational"
inflectional - characterized by inflections indicating grammatical distinctions; "inflectional morphology is used to indicate number and case and tense and person etc."


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References in periodicals archive ?
This leads to another semantic restriction: derivationally redundant affixes do not add semantic content that is already available within a base word (simplex or derived).
erzene 'would be felt', the regular (but practically unacceptable) conditional form of erzik, has been replaced by erzodne (the conditional of another--though derivationally related--verb: erzodik 'is felt', containing the explicit passive/reflexive suffix -od-) because it is homophonous with a potential compound noun er-zene 'the music of the veins' (which could in fact be not more than an innovative metaphor for cardiologists).
At any rate, the figura etymologica in the following passage shows that yuyuvi--was interpreted as derivationally related to yu:
The typical entry represents the derivationally most opaque member of a Latin word family: a present stem, a noun or adjective, an adverb, or a cardinal number.