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3 definitions found
 for Drop hammer
From The Collaborative International Dictionary of English v.0.48 :

  Hammer \Ham"mer\ (h[a^]m"m[~e]r), n. [OE. hamer, AS. hamer,
     hamor; akin to D. hamer, G. & Dan. hammer, Sw. hammare, Icel.
     hamarr, hammer, crag, and perh. to Gr. 'a`kmwn anvil, Skr.
     a[,c]man stone.]
     1. An instrument for driving nails, beating metals, and the
        like, consisting of a head, usually of steel or iron,
        fixed crosswise to a handle.
        [1913 Webster]
  
              With busy hammers closing rivets up.  --Shak.
        [1913 Webster]
  
     2. Something which in form or action resembles the common
        hammer; as:
        (a) That part of a clock which strikes upon the bell to
            indicate the hour.
        (b) The padded mallet of a piano, which strikes the wires,
            to produce the tones.
        (c) (Anat.) The malleus. See under Ear.
        (d) (Gun.) That part of a gunlock which strikes the
            percussion cap, or firing pin; the cock; formerly,
            however, a piece of steel covering the pan of a
            flintlock musket and struck by the flint of the cock
            to ignite the priming.
        (e) Also, a person or thing that smites or shatters; as,
            St. Augustine was the hammer of heresies.
            [1913 Webster]
  
                  He met the stern legionaries [of Rome] who had
                  been the "massive iron hammers" of the whole
                  earth.                            --J. H.
                                                    Newman.
            [1913 Webster]
  
     3. (Athletics) A spherical weight attached to a flexible
        handle and hurled from a mark or ring. The weight of head
        and handle is usually not less than 16 pounds.
        [Webster 1913 Suppl.]
  
     Atmospheric hammer, a dead-stroke hammer in which the
        spring is formed by confined air.
  
     Drop hammer, Face hammer, etc. See under Drop, Face,
        etc.
  
     Hammer fish. See Hammerhead.
  
     Hammer hardening, the process of hardening metal by
        hammering it when cold.
  
     Hammer shell (Zool.), any species of Malleus, a genus of
        marine bivalve shells, allied to the pearl oysters, having
        the wings narrow and elongated, so as to give them a
        hammer-shaped outline; -- called also hammer oyster.
  
     To bring to the hammer, to put up at auction.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Drop \Drop\ (dr[o^]p), n. [OE. drope, AS. dropa; akin to OS.
     dropo, D. drop, OHG. tropo, G. tropfen, Icel. dropi, Sw.
     droppe; and Fr. AS. dre['o]pan to drip, drop; akin to OS.
     driopan, D. druipen, OHG. triofan, G. triefen, Icel.
     drj[=u]pa. Cf. Drip, Droop.]
     1. The quantity of fluid which falls in one small spherical
        mass; a liquid globule; a minim; hence, also, the smallest
        easily measured portion of a fluid; a small quantity; as,
        a drop of water.
        [1913 Webster]
  
              With minute drops from off the eaves. --Milton.
        [1913 Webster]
  
              As dear to me as are the ruddy drops
              That visit my sad heart.              -- Shak.
        [1913 Webster]
  
              That drop of peace divine.            --Keble.
        [1913 Webster]
  
     2. That which resembles, or that which hangs like, a liquid
        drop; as a hanging diamond ornament, an earring, a glass
        pendant on a chandelier, a sugarplum (sometimes
        medicated), or a kind of shot or slug.
        [1913 Webster]
  
     3. (Arch.)
        (a) Same as Gutta.
        (b) Any small pendent ornament.
            [1913 Webster]
  
     4. Whatever is arranged to drop, hang, or fall from an
        elevated position; also, a contrivance for lowering
        something; as:
        (a) A door or platform opening downward; a trap door; that
            part of the gallows on which a culprit stands when he
            is to be hanged; hence, the gallows itself.
        (b) A machine for lowering heavy weights, as packages,
            coal wagons, etc., to a ship's deck.
        (c) A contrivance for temporarily lowering a gas jet.
        (d) A curtain which drops or falls in front of the stage
            of a theater, etc.
        (e) A drop press or drop hammer.
        (f) (Mach.) The distance of the axis of a shaft below the
            base of a hanger.
            [1913 Webster]
  
     5. pl. Any medicine the dose of which is measured by drops;
        as, lavender drops.
        [1913 Webster]
  
     6. (Naut.) The depth of a square sail; -- generally applied
        to the courses only. --Ham. Nav. Encyc.
        [1913 Webster]
  
     7. Act of dropping; sudden fall or descent.
        [1913 Webster]
  
     Ague drop, Black drop. See under Ague, Black.
  
     Drop by drop, in small successive quantities; in repeated
        portions. "Made to taste drop by drop more than the
        bitterness of death." --Burke.
  
     Drop curtain. See Drop, n., 4.
        (d) .
  
     Drop forging. (Mech.)
        (a) A forging made in dies by a drop hammer.
        (b) The process of making drop forgings.
  
     Drop hammer (Mech.), a hammer for forging, striking up
        metal, etc., the weight being raised by a strap or similar
        device, and then released to drop on the metal resting on
        an anvil or die.
  
     Drop kick (Football), a kick given to the ball as it
        rebounds after having been dropped from the hands.
  
     Drop lake, a pigment obtained from Brazil wood. --Mollett.
  
     Drop letter, a letter to be delivered from the same office
        where posted.
  
     Drop press (Mech.), a drop hammer; sometimes, a dead-stroke
        hammer; -- also called drop.
  
     Drop scene, a drop curtain on which a scene is painted. See
        Drop, n., 4.
        (d) .
  
     Drop seed. (Bot.) See the List under Glass.
  
     Drop serene. (Med.) See Amaurosis.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  drop hammer
      n 1: device for making large forgings [syn: drop forge, drop
           hammer, drop press]

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