1. Italian, La Mano Nera. any of various secret criminal groups organized in Italy and operating in the U.S. in the late 19th and early 20th centuries, practicing blackmail and violence.
2. an anarchistic society in Spain, suppressed in 1883.
3. a nationalistic society in Serbia, suppressed in 1914.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.