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From: DICT.TW English-Chinese Dictionary 英漢字典

 coal /ˈkol/

From: Webster's Revised Unabridged Dictionary (1913)

 Coal n.
 1. A thoroughly charred, and extinguished or still ignited, fragment from wood or other combustible substance; charcoal.
 2. Min. A black, or brownish black, solid, combustible substance, dug from beds or veins in the earth to be used for fuel, and consisting, like charcoal, mainly of carbon, but more compact, and often affording, when heated, a large amount of volatile matter.
 Note:This word is often used adjectively, or as the first part of self-explaining compounds; as, coal-black; coal formation; coal scuttle; coal ship. etc.
 Note:In England the plural coals is used, for the broken mineral coal burned in grates, etc.; as, to put coals on the fire. In the United States the singular in a collective sense is the customary usage; as, a hod of coal.
 Age of coal plants. See Age of Acrogens, under Acrogen.
 Anthracite or Glance coal. See Anthracite.
 Bituminous coal. See under Bituminous.
 Blind coal.  See under Blind.
 Brown coal or Brown Lignite. See Lignite.
 Caking coal, a bituminous coal, which softens and becomes pasty or semi-viscid when heated. On increasing the heat, the volatile products are driven off, and a coherent, grayish black, cellular mass of coke is left.
 Cannel coal, a very compact bituminous coal, of fine texture and dull luster. See Cannel coal.
 Coal bed Geol., a layer or stratum of mineral coal.
 Coal breaker, a structure including machines and machinery adapted for crushing, cleansing, and assorting coal.
 Coal field Geol., a region in which deposits of coal occur. Such regions have often a basinlike structure, and are hence called coal basins. See Basin.
 Coal gas, a variety of carbureted hydrogen, procured from bituminous coal, used in lighting streets, houses, etc., and for cooking and heating.
 Coal heaver, a man employed in carrying coal, and esp. in putting it in, and discharging it from, ships.
 Coal measures. Geol. (a) Strata of coal with the attendant rocks. (b) A subdivision of the carboniferous formation, between the millstone grit below and the Permian formation above, and including nearly all the workable coal beds of the world.
 Coal oil, a general name for mineral oils; petroleum.
 Coal plant Geol., one of the remains or impressions of plants found in the strata of the coal formation.
 Coal tar. See in the Vocabulary.
 To haul over the coals, to call to account; to scold or censure. [Colloq.]
 Wood coal. See Lignite.

From: Webster's Revised Unabridged Dictionary (1913)

 Coal, v. t. [imp. & p. p. Coaled p. pr. & vb. n. Coaling.]
 1. To burn to charcoal; to char. [R.]
    Charcoal of roots, coaled into great pieces.   --Bacon.
 2. To mark or delineate with charcoal.
 3. To supply with coal; as, to coal a steamer.

From: Webster's Revised Unabridged Dictionary (1913)

 Coal, v. i. To take in coal; as, the steamer coaled at Southampton.

From: WordNet (r) 2.0

      n 1: fossil fuel consisting of carbonized vegetable matter
           deposited in the Carboniferous period
      2: a hot glowing or smouldering fragment of wood or coal left
         from a fire [syn: ember]
      v 1: burn to charcoal; "Without a drenching rain, the forest fire
           will char everything" [syn: char]
      2: supply with coal
      3: take in coal; "The big ship coaled"

From: Easton's 1897 Bible Dictionary

    It is by no means certain that the Hebrews were acquainted with
    mineral coal, although it is found in Syria. Their common fuel
    was dried dung of animals and wood charcoal. Two different words
    are found in Hebrew to denote coal, both occurring in Prov.
    26:21, "As coal [Heb. peham; i.e., "black coal"] is to burning
    coal [Heb. gehalim]." The latter of these words is used in Job
    41:21; Prov. 6:28; Isa. 44:19. The words "live coal" in Isa. 6:6
    are more correctly "glowing stone." In Lam. 4:8 the expression
    "blacker than a coal" is literally rendered in the margin of the
    Revised Version "darker than blackness." "Coals of fire" (2 Sam.
    22:9, 13; Ps. 18:8, 12, 13, etc.) is an expression used
    metaphorically for lightnings proceeding from God. A false
    tongue is compared to "coals of juniper" (Ps. 120:4; James 3:6).
    "Heaping coals of fire on the head" symbolizes overcoming evil
    with good. The words of Paul (Rom. 12:20) are equivalent to
    saying, "By charity and kindness thou shalt soften down his
    enmity as surely as heaping coals on the fire fuses the metal in
    the crucible."