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1. The act of deriving, drawing or receiving from a source; as the derivation of an estate from ancestors, or of profits from capital, or of truth or facts from antiquity.

2. In grammar, the drawing or tracing of a word from its root or original; as, derivation is from the Latin Derivo, and the latter from rivus, a stream.

3. A drawing from, or turning aside from, a natural course or channel; as the derivation of water from its channel by lateral drains.

4. A drawing of humors from one part of the body to another; as the derivation of humors from the eye, by a blister on the neck.

5. The thing derived or deduced.