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(ld), n.[OE. led, leed, lead, AS. led; akin to D. lood, MHG. lt, G. loth plummet, sounding lead, small weight, Sw. & Dan. lod. 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, forms alloys with other metals, and is an ingredient of solder and type metal. Atomic weight, 206.4. 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 cylinde Lead v. t.[imp. & p. p.Leaded; p. pr. & vb. n.Leading.] 1. To cover, fill, or affect with lead; as, continuous firing leads the grooves of a rifle. 2. (Print.) To place leads between the lines of; as, to lead a page; leaded matter. Lead (ld), v. t.[imp. & p. p.Led (ld); p. pr. & vb. n.Leading.] [OE. leden, AS. ldan (akin to OS. ldian, D. leiden, G. leiten, Icel. lea, Sw. leda, Dan. lede), properly a causative fr. AS. lian to go; akin to OHG. ldan, Icel. la, Goth. leian (in comp.). Cf. Lode, Loath.] 1. To guide or conduct with the hand, or by means of some physical contact or connection; as, a father leads a child; a jockey leads a horse with a halter; a dog leads a blind man. If a blind man lead a blind man, both fall down in the ditch. Wyclif (Matt. xv. 14.) They thrust him out of the city, and led him unto the brow of the hill. Luke iv. 29. In thy right hand lead with thee The mountain nymph, sweet Liberty. Milton. 2. To guide or conduct in a certain course, or to a certain place or end, by making the way known; to show the way, esp. by going with or going in advance of. Hence, figuratively: To direct; to counsel; to instruct; as, to lead a traveler; to lead a pupil. The Lo Lead (), v. i. 1. To guide or conduct, as by accompanying, going before, showing, influencing, directing with authority, etc.; to have precedence or preminence; to be first or chief; -- used in most of the senses of lead, v. t. 2. To tend or reach in a certain direction, or to a certain place; as, the path leads to the mill; gambling leads to other vices. The mountain foot that leads towards Mantua. Shak. To lead off or out, to go first; to begin. Lead n. 1. The act of leading or conducting; guidance; direction; as, to take the lead; to be under the lead of another. At the time I speak of, and having a momentary lead, . . . I am sure I did my country important service. Burke. 2. Precedence; advance position; also, the measure of precedence; as, the white horse had the lead; a lead of a boat's length, or of half a second. 3. (Cards & Dominoes) The act or right of playing first in a game or round; the card suit, or piece, so played; as, your partner has the lead. 4. An open way in an ice field. Kane. 5. (Mining) A lode. 6. (Naut.) The course of a rope from end to end. 7. (Steam Engine) The width of port opening which is uncovered by the valve, for the admission or release of steam, at the instant when the piston is at end of its stroke. When used alone it means outside lead, or lead for the admission of steam. Inside lead refers to the release or exhaust. 8. (Civil Engineering) the distance of haul, as from a cutting to an embankment. 9. (Horology Lead (), n. 1. (Mus.) (a) The announcement by one voice part of a theme to be repeated by the other parts. (b) A mark or a short passage in one voice part, as of a canon, serving as a cue for the entrance of others. 2. In an internal-combustion engine, the distance, measured in actual length of piston stroke or the corresponding angular displacement of the crank, of the piston from the end of the compression stroke when ignition takes place; -- called in full lead of the ignition. When ignition takes place during the working stroke the corresponding distance from the commencement of the stroke is called negative lead. 3. (Mach.) The excess above a right angle in the angle between two consecutive cranks, as of a compound engine, on the same shaft. 4. (Mach.) In spiral screw threads, worm wheels, or the like, the amount of advance of any point in the spiral for a complete turn. 5. (Elec.) (a) A conductor conveying electricity, as from a dynamo. (b) The angle between the line joining the brushes of a continu スポンサード リンク
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