— siderographer , n. — siderographic /sid'euhr euh graf"ik/ , adj.
/sid'euh rog"reuh fee/ , n.
1. the art or technique of engraving on steel.
2. a method of increasing the number of reproductions obtained from a steel engraving by first rolling a soft-steel cylinder over a hardened steel plate and then rolling the hardened cylinder over a soft-steel plate.
[ 1810-20; SIDERO- 1 + -GRAPHY ]