10base2

from The Free On-line Dictionary of Computing (8 July 2008)

10base2

   <networking> (Or "cheapernet") The variant of {Ethernet} that
   uses thin {coaxial} cable (RG-58 or similar), as opposed to
   {10base5} cable.

   The "10" means 10 {Mbps}, "base" means "baseband" as opposed
   to {radio frequency} and "2" means a maximum single cable
   length of 200m.

   (1995-11-14)