Derogation :: Derogation (n.) The act of derogating, partly repealing, or lessening in value; disparagement; detraction; depreciation; -- followed by of, from, or to..
Derogation :: Derogation (n.) An alteration of, or subtraction from, a contract for a sale of stocks..
Siderographical :: Siderographical (a.) Of or pertaining to siderography; executed by engraved plates of steel; as, siderographic art; siderographic impressions..
Siderography :: Siderography (n.) The art or practice of steel engraving; especially, the process, invented by Perkins, of multiplying facsimiles of an engraved steel plate by first rolling over it, when hardened, a soft steel cylinder, and then rolling the cylinder, when hardened, over a soft steel plate, which thus becomes a facsimile of the original. The process has been superseded by electrotypy..