n.1 the act or an instance of deriving or obtaining from a source; the process of being derived.
2 a the formation of a word from another word or from a root. b a derivative. c the tracing of the origin of a word. d a statement or account of this.
3 extraction, descent.
4 Math. a sequence of statements showing that a formula, theorem, etc., is a consequence of previously accepted statements.
Derivatives:
derivational adj.
Etymology: F d{eacute}rivation or L derivatio (as DERIVE)