- Marconi, Guglielmo 1874-1937. Italian engineer and creator whom in 1901 transmitted long-wave radio signals throughout the Atlantic Ocean. He shared the 1909 Nobel Prize in physics.
- Designating, or pert. to, Marconi's system of cordless telegraphy; [archaic]
- Italian electrical professional just who created wireless telegraphy and in 1901 transmitted radio signals throughout the Atlantic Ocean (1874-1937)