What is "moor coal"

Moor \Moor\, n. [OE. mor, AS. m[=o]r moor, morass; akin to D. moer moor, G. moor, and prob. to Goth. marei sea, E. mere. See Mere a lake.]

1. An extensive waste covered with patches of heath, and having a poor, light soil, but sometimes marshy, and abounding in peat; a heath.

   In her girlish age she kept sheep on the moor.
   --Carew.

2. A game preserve consisting of moorland. Moor buzzard (Zo["o]l.), the marsh harrier. [Prov. Eng.] Moor coal (Geol.), a friable variety of lignite. Moor cock (Zo["o]l.), the male of the moor fowl or red grouse of Europe. Moor coot. (Zo["o]l.) See Gallinule. Moor game. (Zo["o]l.) Same as Moor fowl. Moor grass (Bot.), a tufted perennial grass ( Sesleria c[ae]rulea), found in mountain pastures of Europe. Moor hawk (Zo["o]l.), the marsh harrier. Moor hen. (Zo["o]l.)

   1. The female of the moor fowl.

   2. A gallinule, esp. the European species. See Gallinule.

   3. An Australian rail ( Tribonyx ventralis).

      Moor monkey (Zo["o]l.), the black macaque of Borneo ( Macacus maurus).

      Moor titling (Zo["o]l.), the European stonechat ( Pratinocola rubicola).