derivation

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.
   1. development of a theorem.
   2. differentiation(def 2).
6. Grammar.
   1. 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).
   2. the systematic description of such processes in a given language.
7. Linguistics.
   1. 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.
   2. the process by which such a set of forms is derived.

noun

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. 1. the process of deducing a mathematical theorem, formula, etc, as a necessary consequence of a set of accepted statements
   2. this sequence of statements
   3. the operation of finding a derivative

n.

early 15c., from Middle French dérivation (14c.), from Latin derivationem (nominative derivatio) “a leading off, turning away,” noun of action from past participle stem of derivare (see derive). Grammatical sense is older; general meaning “origination, descent” is from c.1600.