i Register
In some senses, greyback is marked as dated, US, colloquial, historical. Watch for register when choosing this word.
greyback
UK /ˈɡɹeɪbak/ US /ˈɡɹeɪbak/
noun 5
Definitions
noun
1
A Confederate soldier during the US Civil War (because of the grey uniforms).
...to resist the farther advance of the greybacks.
Sheridan managed to keep the graybacks at bay while he tore up the railroad, but he abandoned the plan to link up with Hunter, and the southerners soon repaired the railroad.
2
A Confederate States dollar during the US Civil War.
3
A louse.
It is alleged by the defendant that there were scabs and greybacks in it, and that it did not come up to the quality of No. 1 slate as contracted for.
4
Any of various grey birds.
5
A kind of paperboard with a smooth white surface on one side and a grey surface on the other side.
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