der·i·va·tion /ˌdɛrəˈveʃən/ 名詞
1. A leading or drawing off of water from a stream or source. [Obs.]
2. The act of receiving anything from a source; the act of procuring an effect from a cause, means, or condition, as profits from capital, conclusions or opinions from evidence.
As touching traditional communication, . . . I do not doubt but many of those truths have had the help of that derivation. --Sir M. Hale.
3. The act of tracing origin or descent, as in grammar or genealogy; as, the derivation of a word from an Aryan root.
4. The state or method of being derived; the relation of origin when established or asserted.
5. That from which a thing is derived.
6. That which is derived; a derivative; a deduction.
From the Euphrates into an artificial derivation of that river. --Gibbon.
7. Math. The operation of deducing one function from another according to some fixed law, called the law of derivation, as the operation of differentiation or of integration.
8. Med. A drawing of humors or fluids from one part of the body to another, to relieve or lessen a morbid process.
9. The formation of a word from its more original or radical elements; also, a statement of the origin and history of a word.
n 1: the source from which something derives (i.e. comes or
issues); "he prefers shoes of Italian derivation"
2: (historical linguistics) an explanation of the historical
origins of a word or phrase [syn: deriving, etymologizing]
3: a line of reasoning that shows how a conclusion follows
logically from accepted propositions
4: (descriptive linguistics) the process whereby new words are
formed from existing words or bases by affixation:
`singer' from `sing'; `undo' from `do'
5: inherited properties shared with others of your bloodline
[syn: ancestry, lineage, filiation]
6: drawing of fluid or inflammation away from a diseased part
of the body
7: drawing off water from its main channel as for irrigation