(US, slang) A native or established resident of the traditional coal-mining area of northeastern Pennsylvania; a worker in the mines of this region.

The smoke from burning coal.

One of the smallest birds of the tit family Paridae, Periparus ater, with a black cap, white nape patch and greyish body with buff underparts.

(geology) A coal seam.

(geology) A stratum of coal between strata of other rocks.

(idiomatic) Something whose sensitivity to adverse conditions makes it a useful early indicator of such conditions; something which warns of the coming of greater danger or trouble by a deterioration in its health or welfare.

plural of coal-scuttle bonnet

(historical) A kind of woman's bonnet, shaped like an inverted coal scuttle.

plural of canary in the coal mine

plural of canary in a coal mine