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4 definitions found
 for Iron Age
From The Collaborative International Dictionary of English v.0.48 :

  Iron \I"ron\ ([imac]"[u^]rn), a. [AS. [imac]ren, [imac]sen. See
     Iron, n.]
     [1913 Webster]
     1. Of, or made of iron; consisting of iron; as, an iron bar,
        dust.
        [1913 Webster]
  
     2. Resembling iron in color; as, iron blackness.
        [1913 Webster]
  
     3. Like iron in hardness, strength, impenetrability, power of
        endurance, insensibility, etc.; as:
        (a) Rude; hard; harsh; severe.
            [1913 Webster]
  
                  Iron years of wars and dangers.   --Rowe.
            [1913 Webster]
  
                  Jove crushed the nations with an iron rod.
                                                    --Pope.
        (b) Firm; robust; enduring; as, an iron constitution.
        (c) Inflexible; unrelenting; as, an iron will.
        (d) Not to be broken; holding or binding fast; tenacious.
            "Him death's iron sleep oppressed." --Philips.
            [1913 Webster]
  
     Note: Iron is often used in composition, denoting made of
           iron, relating to iron, of or with iron; producing
           iron, etc.; resembling iron, literally or figuratively,
           in some of its properties or characteristics; as,
           iron-shod, iron-sheathed, iron-fisted, iron-framed,
           iron-handed, iron-hearted, iron foundry or
           iron-foundry.
           [1913 Webster]
  
     Iron age.
        (a) (Myth.) The age following the golden, silver, and
            bronze ages, and characterized by a general
            degeneration of talent and virtue, and of literary
            excellence. In Roman literature the Iron Age is
            commonly regarded as beginning after the taking of
            Rome by the Goths, A. D. 410.
        (b) (Arch[ae]ol.) That stage in the development of any
            people characterized by the use of iron implements in
            the place of the more cumbrous stone and bronze.
  
     Iron cement, a cement for joints, composed of cast-iron
        borings or filings, sal ammoniac, etc.
  
     Iron clay (Min.), a yellowish clay containing a large
        proportion of an ore of iron.
  
     Iron cross, a German, and before that Prussian, order of
        military merit; also, the decoration of the order.
  
     Iron crown, a golden crown set with jewels, belonging
        originally to the Lombard kings, and indicating the
        dominion of Italy. It was so called from containing a
        circle said to have been forged from one of the nails in
        the cross of Christ.
  
     Iron flint (Min.), an opaque, flintlike, ferruginous
        variety of quartz.
  
     Iron founder, a maker of iron castings.
  
     Iron foundry, the place where iron castings are made.
  
     Iron furnace, a furnace for reducing iron from the ore, or
        for melting iron for castings, etc.; a forge; a
        reverberatory; a bloomery.
  
     Iron glance (Min.), hematite.
  
     Iron hat, a headpiece of iron or steel, shaped like a hat
        with a broad brim, and used as armor during the Middle
        Ages.
  
     Iron horse, a locomotive engine. [Colloq.]
  
     Iron liquor, a solution of an iron salt, used as a mordant
        by dyers.
  
     Iron man (Cotton Manuf.), a name for the self-acting
        spinning mule.
  
     Iron mold or Iron mould, a yellow spot on cloth stained
        by rusty iron.
  
     Iron ore (Min.), any native compound of iron from which the
        metal may be profitably extracted. The principal ores are
        magnetite, hematite, siderite, limonite, G["o]thite,
        turgite, and the bog and clay iron ores.
  
     Iron pyrites (Min.), common pyrites, or pyrite. See
        Pyrites.
  
     Iron sand, an iron ore in grains, usually the magnetic iron
        ore, formerly used to sand paper after writing.
  
     Iron scale, the thin film which forms on the surface of
        wrought iron in the process of forging. It consists
        essentially of the magnetic oxide of iron, Fe3O4.
  
     Iron works, a furnace where iron is smelted, or a forge,
        rolling mill, or foundry, where it is made into heavy
        work, such as shafting, rails, cannon, merchant bar, etc.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  Iron Age
      n 1: (archeology) the period following the Bronze Age;
           characterized by rapid spread of iron tools and weapons
      2: (classical mythology) the last and worst age of the world

From The Jargon File (version 4.4.7, 29 Dec 2003) :

  Iron Age
   n.
  
      In the history of computing, 1961-1971 ? the formative era of commercial {
      mainframe technology, when ferrite-core dinosaurs ruled the earth. The
      Iron Age began, ironically enough, with the delivery of the first
      minicomputer (the PDP-1) and ended with the introduction of the first
      commercial microprocessor (the Intel 4004) in 1971. See also Stone Age;
      compare elder days.
  

From The Free On-line Dictionary of Computing (18 March 2015) :

  Iron Age
  
      In the history of computing, 1961-1971 - the
     formative era of commercial mainframe technology, when
     ferrite core memory dinosaurs ruled the earth.  The Iron
     Age began, ironically enough, with the delivery of the first
     minicomputer (the PDP-1) and ended with the introduction
     of the first commercial microprocessor (the Intel 4004) in
     1971.
  
     See also Stone Age; compare elder days.
  
     [{Jargon File]
  
     (2003-09-27)
  

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