derivation

[der-uh-vey-shuhn]
noun
1.
the act or fact of deriving or of being derived.
2.
the process of deriving.
3.
the source from which something is derived; origin.
4.
something that is or has been derived; derivative.
5.
Mathematics.
a.
development of a theorem.
6.
Grammar.
a.
the process or device of adding affixes to or changing the shape of a base, thereby assigning the result to a form class that may undergo further inflection or participate in different syntactic constructions, as in forming service from serve, song from sing, and hardness from hard (contrasted with inflection ).
b.
the systematic description of such processes in a given language.
7.
Linguistics.
a.
a set of forms, including the initial form, intermediate forms, and final form, showing the successive stages in the generation of a sentence as the rules of a generative grammar are applied to it.
b.
the process by which such a set of forms is derived.

Origin:
1375–1425; late Middle English derivacioun < Latin dērīvātiōn- (stem of dērīvātiō) a turning away, equivalent to dērīvāt(us) (past participle of dērīvāre; see derive, -ate1) + -iōn- -ion

derivational, adjective
derivationally, adverb
prederivation, noun
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World English Dictionary
derivation (ˌdɛrɪˈveɪʃən)
 
n
1.  the act of deriving or state of being derived
2.  the source, origin, or descent of something, such as a word
3.  something derived; a derivative
4.  a.  the process of deducing a mathematical theorem, formula, etc, as a necessary consequence of a set of accepted statements
 b.  this sequence of statements
 c.  the operation of finding a derivative
 
deri'vational
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

derivation
1520s (grammatical sense is oldest), from Fr. dérivation (14c.), from L. derivationem, noun of action from derivare (see derive). General meaning "origination, descent" is from c.1600.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The term shortening for fat has the same derivation.
The adjectives used such as huge and derivation thereof are repeated often.
It may be interesting to know something about the derivation of some of them.
Many countries also have regulations on the derivation and use in research of
  human embryonic stem cells.
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