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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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."
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


Stemming from an original source:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
In fact, we do not find any nouns derivationally independent of the verbal stem.
This (derivationally conceived) computation takes place as a logical structure outside time and space (cp.
Stemming is the process of reducing inflectional forms and sometimes derivationally related forms of a word to a common base form.
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).
We assume that ?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).
In FG, the illocutionary value of explicit performative utterances is obtained derivationally from a basic sentence type through the use of an explicit performative verb (e.g.
According to FG, the illocutionary meaning of explicit performative utterances is obtained derivationally where the starting point is the basic sentence type (e.g.
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.