derivation (noun)
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