DICT.TW Dictionary Taiwan
Lead n.
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° 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.
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.
I would have the tower two stories, and goodly leads upon the top. --Bacon
3. A small cylinder of black lead or graphite, used in pencils.
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
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, Leucæna 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.
Mock, a. Imitating reality, but not real; false; counterfeit; assumed; sham.
That superior greatness and mock majesty. --Spectator.
Mock bishop's weed Bot., a genus of slender umbelliferous herbs (Discopleura) growing in wet places.
Mock heroic, burlesquing the heroic; as, a mock heroic poem.
Mock lead. See Blende (a).
Mock nightingale Zool., the European blackcap.
Mock orange Bot., a genus of American and Asiatic shrubs (Philadelphus), with showy white flowers in panicled cymes. Philadelphus coronarius, from Asia, has fragrant flowers; the American kinds are nearly scentless.
Mock sun. See Parhelion.
Mock turtle soup, a soup made of calf's head, veal, or other meat, and condiments, in imitation of green turtle soup.
Mock velvet, a fabric made in imitation of velvet. See Mockado.
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Blende n. Min. (a) A mineral, called also sphalerite, and by miners mock lead, false galena, and black-jack. It is a zinc sulphide, but often contains some iron. Its color is usually yellow, brown, or black, and its luster resinous. (b) A general term for some minerals, chiefly metallic sulphides which have a somewhat brilliant but nonmetallic luster.
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