The Collaborative International Dictionary of English v.0.48:

Coral \Cor"al\, n. [Of. coral, F, corail, L. corallum, coralium,
   fr. Gr. kora`llion.]
   1. (Zool.) The hard parts or skeleton of various Anthozoa,
      and of a few Hydrozoa. Similar structures are also formed
      by some Bryozoa.
      [1913 Webster]

   Note: The large stony corals forming coral reefs belong to
         various genera of Madreporaria, and to the hydroid
         genus, Millepora. The red coral, used in jewelry, is
         the stony axis of the stem of a gorgonian (Corallium
         rubrum) found chiefly in the Mediterranean. The fan
         corals, plume corals, and sea feathers are species
         of Gorgoniacea, in which the axis is horny.
         Organ-pipe coral is formed by the genus Tubipora, an
         Alcyonarian, and black coral is in part the axis of
         species of the genus Antipathes. See Anthozoa,
         Madrepora.
         [1913 Webster]

   2. The ovaries of a cooked lobster; -- so called from their
      color.
      [1913 Webster]

   3. A piece of coral, usually fitted with small bells and
      other appurtenances, used by children as a plaything.
      [1913 Webster]

   Brain coral, or Brain stone coral. See under Brain.

   Chain coral. See under Chain.

   Coral animal (Zool.), one of the polyps by which corals are
      formed. They are often very erroneously called coral
      insects.

   Coral fish. See in the Vocabulary.

   Coral reefs (Phys. Geog.), reefs, often of great extent,
      made up chiefly of fragments of corals, coral sands, and
      the solid limestone resulting from their consolidation.
      They are classed as fringing reefs, when they border the
      land; barrier reefs, when separated from the shore by a
      broad belt of water; atolls, when they constitute
      separate islands, usually inclosing a lagoon. See Atoll.


   Coral root (Bot.), a genus (Corallorhiza) of orchideous
      plants, of a yellowish or brownish red color, parasitic on
      roots of other plants, and having curious jointed or
      knotted roots not unlike some kinds of coral. See Illust.
      under Coralloid.

   Coral snake. (Zo)
      (a) A small, venomous, Brazilian snake (Elaps
          corallinus), coral-red, with black bands.
      (b) A small, harmless, South American snake (Tortrix
          scytale).

   Coral tree (Bot.), a tropical, leguminous plant, of several
      species, with showy, scarlet blossoms and coral-red seeds.
      The best known is Erythrina Corallodendron.

   Coral wood, a hard, red cabinet wood. --McElrath.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

colorful \colorful\ adj.
   1. having striking color. Opposite of colorless.

   Note: [Narrower terms: changeable, chatoyant, iridescent,
         shot; deep, rich; flaming; fluorescent, glowing;
         prismatic; psychedelic; red, ruddy, flushed,
         empurpled]

   Syn: colourful.
        [WordNet 1.5]

   2. striking in variety and interest. Opposite of colorless
      or dull. [Narrower terms: brave, fine, gay, glorious;
      flamboyant, resplendent, unrestrained; flashy, gaudy,
      jazzy, showy, snazzy, sporty; picturesque]
      [WordNet 1.5]

   3. having color or a certain color; not black, white or grey;
      as, colored crepe paper. Opposite of colorless and
      monochrome.

   Note: [Narrower terms: tinted; touched, tinged; amber,
         brownish-yellow, yellow-brown; amethyst; auburn,
         reddish-brown; aureate, gilded, gilt, gold, golden;
         azure, cerulean, sky-blue, bright blue; bicolor,
         bicolour, bicolored, bicoloured, bichrome; blue,
         bluish, light-blue, dark-blue; blushful,
         blush-colored, rosy; bottle-green; bronze, bronzy;
         brown, brownish, dark-brown; buff; canary,
         canary-yellow; caramel, caramel brown; carnation;
         chartreuse; chestnut; dun; earth-colored,
         earthlike; fuscous; green, greenish, light-green,
         dark-green; jade, jade-green; khaki; lavender,
         lilac; mauve; moss green, mosstone; motley,
         multicolor, culticolour, multicolored, multicoloured,
         painted, particolored, particoloured, piebald, pied,
         varicolored, varicoloured; mousy, mouse-colored;
         ocher, ochre; olive-brown; olive-drab; olive;
         orange, orangish; peacock-blue; pink, pinkish;
         purple, violet, purplish; red, blood-red, carmine,
         cerise, cherry, cherry-red, crimson, ruby, ruby-red,
         scarlet; red, reddish; rose, roseate; rose-red;
         rust, rusty, rust-colored; snuff, snuff-brown,
         snuff-color, snuff-colour, snuff-colored,
         snuff-coloured, mummy-brown, chukker-brown; sorrel,
         brownish-orange; stone, stone-gray; straw-color,
         straw-colored, straw-coloured; tan; tangerine;
         tawny; ultramarine; umber; vermilion,
         vermillion, cinibar, Chinese-red; yellow, yellowish;
         yellow-green; avocado; bay; beige; blae
         bluish-black or gray-blue); coral; creamy; cress
         green, cresson, watercress; hazel; honey,
         honey-colored; hued(postnominal); magenta;
         maroon; pea-green; russet; sage, sage-green;
         sea-green] [Also See: chromatic, colored, dark,
         light.]

   Syn: colored, coloured, in color(predicate).
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

coral
    adj 1: of a strong pink to yellowish-pink color
    n 1: a variable color averaging a deep pink
    2: the hard stony skeleton of a Mediterranean coral that has a
       delicate red or pink color and is used for jewelry [syn:
       coral, red coral, precious coral]
    3: unfertilized lobster roe; reddens in cooking; used as garnish
       or to color sauces
    4: marine colonial polyp characterized by a calcareous skeleton;
       masses in a variety of shapes often forming reefs

The Free On-line Dictionary of Computing (30 December 2018):

CORAL

   1. Class Oriented Ring Associated Language.

   2. A deductive database and logic programming system based
   on Horn-clause rules with extensions like SQL's group-by
   and aggregation operators.  CORAL was developed at the
   University of Wisconsin-Madison.  It is implemented in C++ and
   has a Prolog-like syntax.

   Many evaluation techniques are supported, including bottom-up
   fixpoint evaluation and top-down backtracking.  Modules
   are separately compiled; different evaluation methods can be
   used in different modules within a single program.
   Disk-resident data is supported via an interface to the
   Exodus storage manager.  There is an on-line help facility.
   It requires AT&T C++ 2.0 (or G++ soon) and runs on
   Decstation and Sun-4.

   (ftp://ftp.cs.wisc.edu/).

   (1993-01-29)


Easton's 1897 Bible Dictionary:

Coral
   Heb. ramoth, meaning "heights;" i.e., "high-priced" or valuable
   things, or, as some suppose, "that which grows high," like a
   tree (Job 28:18; Ezek. 27:16), according to the Rabbins, red
   coral, which was in use for ornaments.

     The coral is a cretaceous marine product, the deposit by
   minute polypous animals of calcareous matter in cells in which
   the animal lives. It is of numberless shapes as it grows, but
   usually is branched like a tree. Great coral reefs and coral
   islands abound in the Red Sea, whence probably the Hebrews
   derived their knowledge of it. It is found of different colours,
   white, black, and red. The red, being esteemed the most
   precious, was used, as noticed above, for ornamental purposes.