From The Collaborative International Dictionary of English v.0.48 [gcide]:
busbar \busbar\, bus-bar \bus-bar\n.
an electrical conductor that makes a common connection
between several circuits.
Syn: busbar, bus.
[WordNet 1.5]
From WordNet (r) 3.0 (2006) [wn]:
busbar
n 1: an electrical conductor that makes a common connection
between several circuits; "the busbar in this computer can
transmit data either way between any two components of the
system" [syn: busbar, bus]