Meaning of SIDEROGRAPHY in English

SIDEROGRAPHY

noun 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 the process has been superseded by electrotypy.

Webster English vocab.      Английский словарь Webster.