Streamer \Stream"er\, n.

1. An ensign, flag, or pennant, which floats in the wind; specifically, a long, narrow, ribbonlike flag.

Brave Rupert from afar appears, Whose waving streamers the glad general knows. --Dryden.

3. A stream or column of light shooting upward from the horizon, constituting one of the forms of the aurora borealis. --Macaulay.

While overhead the North's dumb streamers shoot. --Lowell.

3. (Mining) A searcher for stream tin.

Source: Webster's Revised Unabridged Dictionary (1913)