razor grinder

razor grinder (plural razor grinders)

1. A large brown cicada, Henicopsaltria eydouxii, of eastern Australia.

From razor +‎ grinder

razor grinder (plural razor grinders)

1. A professional who sharpens and shapes razor blades and other metal tools using grinding and polishing machines to achieve a fine edge or surface finish; now largely replaced by automated machinery, it was historically known for being physically demanding and dangerous, with high mortality rates due to equipment failure and health issues like grinder's asthma.

The razor grinding profession began in the 17th century with the development of the first modern straight razors in Sheffield, England, around 1680. This profession became more formalized with innovations in the 18th century, particularly Benjamin Huntsman's 1740 development of superior-quality crucible steel and the hollow-grinding process for blades. ^[1]