Source : Webster's Revised Unabridged Dictionary (1913)

Red \Red\, a. [Compar. {Redder} (-d?r); superl. {Reddest}.] [OE.
   red, reed, AS. re['a]d, re['o]d; akin to OS. r[=o]d, OFries.
   r[=a]d, D. rood, G. roht, rot, OHG. r[=o]t, Dan. & Sw.
   r["o]d, Icel. rau[eth]r, rj[=o][eth]r, Goth. r['a]uds, W.
   rhudd, Armor. ruz, Ir. & Gael. ruadh, L. ruber, rufus, Gr.
   'eryqro`s, Skr. rudhira, rohita; cf. L. rutilus. [root]113.
   Cf. {Erysipelas}, {Rouge}, {Rubric}, {Ruby}, {Ruddy},
   {Russet}, {Rust}.]
   Of the color of blood, or of a tint resembling that color; of
   the hue of that part of the rainbow, or of the solar
   spectrum, which is furthest from the violet part. ``Fresh
   flowers, white and reede.'' --Chaucer.

         Your color, I warrant you, is as red as any rose.
                                                  --Shak.

   Note: Red is a general term, including many different shades
         or hues, as scarlet, crimson, vermilion, orange red,
         and the like.

   Note: Red is often used in the formation of self-explaining
         compounds; as, red-breasted, red-cheeked, red-faced,
         red-haired, red-headed, red-skinned, red-tailed,
         red-topped, red-whiskered, red-coasted.

   {Red admiral} (Zo["o]l.), a beautiful butterfly ({Vanessa
      Atalanta}) common in both Europe and America. The front
      wings are crossed by a broad orange red band. The larva
      feeds on nettles. Called also {Atlanta butterfly}, and
      {nettle butterfly}.

   {Red ant}. (Zo["o]l.)
   (a) A very small ant ({Myrmica molesta}) which often infests
       houses.
   (b) A larger reddish ant ({Formica sanquinea}), native of
       Europe and America. It is one of the slave-making
       species.

   {Red antimony} (Min.), kermesite. See {Kermes mineral}
   (b), under {Kermes}.

   {Red ash} (Bot.), an American tree ({Fraxinus pubescens}),
      smaller than the white ash, and less valuable for timber.
      --Cray.

   {Red bass}. (Zo["o]l.) See {Redfish}
   (d) .

   {Red bay} (Bot.), a tree ({Persea Caroliniensis}) having the
      heartwood red, found in swamps in the Southern United
      States.

   {Red beard} (Zo["o]l.), a bright red sponge ({Microciona
      prolifera}), common on oyster shells and stones. [Local,
      U.S.]

   {Red birch} (Bot.), a species of birch ({Betula nigra})
      having reddish brown bark, and compact, light-colored
      wood. --Gray.

   {Red blindness}. (Med.) See {Daltonism}.

   {Red book}, a book containing the names of all the persons in
      the service of the state. [Eng.]

   {Red book of the Exchequer}, an ancient record in which are
      registered the names of all that held lands per baroniam
      in the time of Henry II. --Brande & C.

   {Red brass}, an alloy containing eight parts of copper and
      three of zinc.

   {Red bug}. (Zo["o]l.)
   (a) A very small mite which in Florida attacks man, and
       produces great irritation by its bites.
   (b) A red hemipterous insect of the genus {Pyrrhocoris},
       especially the European species ({P. apterus}), which is
       bright scarlet and lives in clusters on tree trunks.
   (c) See {Cotton stainder}, under {Cotton}.

   {Red cedar}. (Bot.) An evergreen North American tree
      ({Juniperus Virginiana}) having a fragrant red-colored
      heartwood.
   (b) A tree of India and Australia ({Cedrela Toona}) having
       fragrant reddish wood; -- called also {toon tree} in
       India.

Source : Free On-Line Dictionary of Computing

Red Book
     
        1.   Informal name for one of the four standard
        references on {PostScript}.  The other three official guides
        are known as the {Blue Book}, the {Green Book}, and the {White
        Book}.
     
        ["PostScript Language Reference Manual", Adobe Systems,
        Addison-Wesley, 1985 (ISBN 0-201-10174-2); second edition
        1990 (ISBN 0-201-18127-4)].
     
        2.  Informal name for one of the three standard
        references on Smalltalk.  This book also has blue and green
        siblings.
     
        ["Smalltalk-80: The Interactive Programming Environment",
        Adele Goldberg, Addison-Wesley, 1984; (ISBN 0-201-11372-4)].
     
        3.   Any of the 1984 standards issued by the
        {ITU-T} eighth plenary assembly.  These include, among other
        things, the {X.400} {electronic mail} specification, the Group
        1 through 4 fax standards, {ISDN}, the R2 signalling system
        (Q.400 series recommendations), data communication via the
        {PSTN} (the V series recommendations) and tariffs and metering
        principles (the D series).
     
        4.   The new version of the {Green Book} - IEEE
        1003.1-1990, also known as ISO 9945-1 - is (because of the
        colour and the fact that it is printed on A4 paper) known in
        the USA. as "the Ugly Red Book That Won't Fit On The Shelf"
        and in Europe as "the Ugly Red Book That's A Sensible Size".
     
        5.   The NSA "Trusted Network Interpretation"
        companion to the {Orange Book}.
     
        See also {book titles}.
     
        [{Jargon File}]