• noun:   drawing off water from its main channel as for irrigation
• noun:   drawing of fluid or inflammation away from a diseased part of the body
• noun:   a line of reasoning that shows how a conclusion follows logically from accepted propositions
• noun:   the source from which something derives (i.e. comes or issues)

  Example: "He prefers shoes of Italian derivation"

• noun:   (descriptive linguistics) the process whereby new words are formed from existing words or bases by affixation: `singer' from `sing'; `undo' from `do'
• noun:   (historical linguistics) an explanation of the historical origins of a word or phrase
• noun:   inherited properties shared with others of your bloodline

Related words...