derive

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derive pass. and intr. emanate, take its origin XIV; trans. conduct (water) from a source into a channel XV; †convey, direct; obtain from a source XVI. — (O)F. dériver or L. dērīvāre, f. DE- 2 + rīvus brook, stream.
So derivation origination, spec. of a word; deviation into a channel; (med.) withdrawal of morbid fluid. XV. derivative XV. — F. — L.

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