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
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
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