| 释义 |
ferretto|fɛˈrɛtəʊ|
Also feretto.
[a. It. ferretto (di Spagna), dim. of ferro iron:—L. ferrum.]
Copper calcined with brimstone or white vitriol, used to colour glass.
1662Merrett tr. Neri's Art of Glass 29 To make Ferretto is nothing but a simple Calcination of Copper. 1753Chambers Cycl. Supp., Feretto, a substance which serves to colour glass. 1799G. Smith Laboratory I. 123 Feretto of Spain, is thus prepared. |
