灰背类动物；

1. 灰鲸/黑头鸦/南军的士兵：grey /灰色/灰/灰白/ | greyback /灰鲸/黑头鸦/南军的士兵/ | greybeard /老人/土制[石制] 酒壶/

1. a sandpiper that breeds in the Arctic and winters in the southern hemisphere

    Synonym: knotgraybackCalidris canutus

2. a dowitcher with a grey back

    Synonym: graybackLimnodromus griseus

3. `Johnny'' was applied as a nickname for Confederate soldiers by the Federal soldiers in the American Civil War
    `greyback'' derived from their grey Confederate uniforms

    Synonym: RebelRebJohnny RebJohnny