long distance signal

What they felt was only a long distance signal from one barbarian clan to another.

WIAR, along with other stations in broadcasting range, had agreed to be silent one night a week so listeners could try to receive long distance signals.

The hobby of listening to long distance signals is known as DX or DX'ing, from an old telegraph abbreviation for "distance".

Next, it helps to coordinate proper development of the arising organs, such as roots, cotyledons and leaves and mediates long distance signals between them, contributing so to the overal architecture of the plant.