The Collaborative International Dictionary of English v.0.48:

Lead \Lead\ (l[e^]d), n. [OE. led, leed, lead, AS. le['a]d; akin
   to D. lood, MHG. l[=o]t, G. loth plummet, sounding lead,
   small weight, Sw. & Dan. lod. [root]123.]
   1. (Chem.) One of the elements, a heavy, pliable, inelastic
      metal, having a bright, bluish color, but easily
      tarnished. It is both malleable and ductile, though with
      little tenacity, and is used for tubes, sheets, bullets,
      etc. Its specific gravity is 11.37. It is easily fusible
      (melting point 327.5[deg] C), forms alloys with other
      metals, and is an ingredient of solder and type metal.
      Atomic number 82. Atomic weight, 207.2. Symbol Pb (L.
      Plumbum). It is chiefly obtained from the mineral galena,
      lead sulphide.
      [1913 Webster]

   2. An article made of lead or an alloy of lead; as:
      (a) A plummet or mass of lead, used in sounding at sea.
      (b) (Print.) A thin strip of type metal, used to separate
          lines of type in printing.
      (c) Sheets or plates of lead used as a covering for roofs;
          hence, pl., a roof covered with lead sheets or terne
          plates.
          [1913 Webster]

                I would have the tower two stories, and goodly
                leads upon the top.               --Bacon
          [1913 Webster]

   3. A small cylinder of black lead or graphite, used in
      pencils.
      [1913 Webster]

   Black lead, graphite or plumbago; -- so called from its
      leadlike appearance and streak. [Colloq.]

   Coasting lead, a sounding lead intermediate in weight
      between a hand lead and deep-sea lead.

   Deep-sea lead, the heaviest of sounding leads, used in
      water exceeding a hundred fathoms in depth. --Ham. Nav.
      Encyc.

   Hand lead, a small lead use for sounding in shallow water.


   Krems lead, Kremnitz lead [so called from Krems or
      Kremnitz, in Austria], a pure variety of white lead,
      formed into tablets, and called also Krems white, or
      Kremnitz white, and Vienna white.

   Lead arming, tallow put in the hollow of a sounding lead.
      See To arm the lead (below).

   Lead colic. See under Colic.

   Lead color, a deep bluish gray color, like tarnished lead.


   Lead glance. (Min.) Same as Galena.

   Lead line
      (a) (Med.) A dark line along the gums produced by a
          deposit of metallic lead, due to lead poisoning.
      (b) (Naut.) A sounding line.

   Lead mill, a leaden polishing wheel, used by lapidaries.

   Lead ocher (Min.), a massive sulphur-yellow oxide of lead.
      Same as Massicot.

   Lead pencil, a pencil of which the marking material is
      graphite (black lead).

   Lead plant (Bot.), a low leguminous plant, genus Amorpha
      (Amorpha canescens), found in the Northwestern United
      States, where its presence is supposed to indicate lead
      ore. --Gray.

   Lead tree.
      (a) (Bot.) A West Indian name for the tropical, leguminous
          tree, Leuc[ae]na glauca; -- probably so called from
          the glaucous color of the foliage.
      (b) (Chem.) Lead crystallized in arborescent forms from a
          solution of some lead salt, as by suspending a strip
          of zinc in lead acetate.

   Mock lead, a miner's term for blende.

   Red lead, a scarlet, crystalline, granular powder,
      consisting of minium when pure, but commonly containing
      several of the oxides of lead. It is used as a paint or
      cement and also as an ingredient of flint glass.

   Red lead ore (Min.), crocoite.

   Sugar of lead, acetate of lead.

   To arm the lead, to fill the hollow in the bottom of a
      sounding lead with tallow in order to discover the nature
      of the bottom by the substances adhering. --Ham. Nav.
      Encyc.

   To cast the lead, or To heave the lead, to cast the
      sounding lead for ascertaining the depth of water.

   White lead, hydrated carbonate of lead, obtained as a
      white, amorphous powder, and much used as an ingredient of
      white paint.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sugar \Sug"ar\, n. [OE. sugre, F. sucre (cf. It. zucchero, Sp.
   az['u]car), fr. Ar. sukkar, assukkar, fr. Skr. [,c]arkar[=a]
   sugar, gravel; cf. Per. shakar. Cf. Saccharine, Sucrose.]
   1. A sweet white (or brownish yellow) crystalline substance,
      of a sandy or granular consistency, obtained by
      crystallizing the evaporated juice of certain plants, as
      the sugar cane, sorghum, beet root, sugar maple, etc. It
      is used for seasoning and preserving many kinds of food
      and drink. Ordinary sugar is essentially sucrose. See the
      Note below.
      [1913 Webster]

   Note: The term sugar includes several commercial grades, as
         the white or refined, granulated, loaf or lump, and the
         raw brown or muscovado. In a more general sense, it
         includes several distinct chemical compounds, as the
         glucoses, or grape sugars (including glucose proper,
         dextrose, and levulose), and the sucroses, or true
         sugars (as cane sugar). All sugars are carbohydrates.
         See Carbohydrate. The glucoses, or grape sugars, are
         ketone alcohols of the formula C6H12O6, and they turn
         the plane of polarization to the right or the left.
         They are produced from the amyloses and sucroses, as by
         the action of heat and acids of ferments, and are
         themselves decomposed by fermentation into alcohol and
         carbon dioxide. The only sugar (called acrose) as yet
         produced artificially belongs to this class. The
         sucroses, or cane sugars, are doubled glucose
         anhydrides of the formula C12H22O11. They are usually
         not fermentable as such (cf. Sucrose), and they act
         on polarized light.
         [1913 Webster]

   2. By extension, anything resembling sugar in taste or
      appearance; as, sugar of lead (lead acetate), a poisonous
      white crystalline substance having a sweet taste.
      [1913 Webster]

   3. Compliment or flattery used to disguise or render
      acceptable something obnoxious; honeyed or soothing words.
      [Colloq.]
      [1913 Webster]

   Acorn sugar. See Quercite.

   Cane sugar, sugar made from the sugar cane; sucrose, or an
      isomeric sugar. See Sucrose.

   Diabetes sugar, or Diabetic sugar (Med. Chem.), a variety
      of sugar (grape sugar or dextrose) excreted in the urine
      in diabetes mellitus; -- the presence of such a sugar in
      the urine is used to diagnose the illness.

   Fruit sugar. See under Fruit, and Fructose.

   Grape sugar, a sirupy or white crystalline sugar (dextrose
      or glucose) found as a characteristic ingredient of ripe
      grapes, and also produced from many other sources. See
      Dextrose, and Glucose.

   Invert sugar. See under Invert.

   Malt sugar, a variety of sugar isomeric with sucrose, found
      in malt. See Maltose.

   Manna sugar, a substance found in manna, resembling, but
      distinct from, the sugars. See Mannite.

   Milk sugar, a variety of sugar characteristic of fresh
      milk, and isomeric with sucrose. See Lactose.

   Muscle sugar, a sweet white crystalline substance isomeric
      with, and formerly regarded to, the glucoses. It is found
      in the tissue of muscle, the heart, liver, etc. Called
      also heart sugar. See Inosite.

   Pine sugar. See Pinite.

   Starch sugar (Com. Chem.), a variety of dextrose made by
      the action of heat and acids on starch from corn,
      potatoes, etc.; -- called also potato sugar, corn
      sugar, and, inaccurately, invert sugar. See Dextrose,
      and Glucose.

   Sugar barek, one who refines sugar.

   Sugar beet (Bot.), a variety of beet (Beta vulgaris) with
      very large white roots, extensively grown, esp. in Europe,
      for the sugar obtained from them.

   Sugar berry (Bot.), the hackberry.

   Sugar bird (Zool.), any one of several species of small
      South American singing birds of the genera Coereba,
      Dacnis, and allied genera belonging to the family
      Coerebidae. They are allied to the honey eaters.

   Sugar bush. See Sugar orchard.

   Sugar camp, a place in or near a sugar orchard, where maple
      sugar is made.

   Sugar candian, sugar candy. [Obs.]

   Sugar candy, sugar clarified and concreted or crystallized;
      candy made from sugar.

   Sugar cane (Bot.), a tall perennial grass (Saccharum
      officinarium), with thick short-jointed stems. It has
      been cultivated for ages as the principal source of sugar.


   Sugar loaf.
      (a) A loaf or mass of refined sugar, usually in the form
          of a truncated cone.
      (b) A hat shaped like a sugar loaf.
          [1913 Webster]

                Why, do not or know you, grannam, and that sugar
                loaf?                             --J. Webster.
          [1913 Webster]

   Sugar maple (Bot.), the rock maple (Acer saccharinum).
      See Maple.

   Sugar mill, a machine for pressing out the juice of the
      sugar cane, usually consisting of three or more rollers,
      between which the cane is passed.

   Sugar mite. (Zool.)
      (a) A small mite (Tyroglyphus sacchari), often found in
          great numbers in unrefined sugar.
      (b) The lepisma.

   Sugar of lead. See Sugar, 2, above.

   Sugar of milk. See under Milk.

   Sugar orchard, a collection of maple trees selected and
      preserved for purpose of obtaining sugar from them; --
      called also, sometimes, sugar bush. [U.S.] --Bartlett.

   Sugar pine (Bot.), an immense coniferous tree (Pinus
      Lambertiana) of California and Oregon, furnishing a soft
      and easily worked timber. The resinous exudation from the
      stumps, etc., has a sweetish taste, and has been used as a
      substitute for sugar.

   Sugar squirrel (Zool.), an Australian flying phalanger
      (Belideus sciureus), having a long bushy tail and a
      large parachute. It resembles a flying squirrel. See
      Illust. under Phlanger.

   Sugar tongs, small tongs, as of silver, used at table for
      taking lumps of sugar from a sugar bowl.

   Sugar tree. (Bot.) See Sugar maple, above.
      [1913 Webster]

WordNet (r) 3.0 (2006):

sugar of lead
    n 1: a poisonous white solid (Pb[CH3CO]2) used in dyeing cotton
         and in making enamels and varnishes [syn: lead acetate,
         sugar of lead]