ground signal
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[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c7/Castleton_East_Junction_signal_box_21_signal.jpg/220px-Castleton_East_Junction_signal_box_21_signal.jpg)
Noun
[edit]ground signal (plural ground signals)
- (rail transport) A dwarf railway signal, mounted close to the ground.
- Synonym: dod
ground signal (plural ground signals)