Lead is a chemical element in the carbon group with symbol Pb (from Latin: plumbum) and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color after being freshly cut, but it soon tarnishes to a dull grayish color when exposed to air. Lead has a shiny chrome-silver luster when it is melted into a liquid.
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Some articles on lead:
... pigments such as the cadmium sulfides and the lead/strontium/barium chromates ... Unlike lead chromate+lead sulfate lemon, bismuth vanadate does not readily blacken with UV exposure ...
... By 1795 the former Templar mills were being used for preparing lead ... Sheets of lead were placed in clay pots and submerged in urine, then heated by decaying cow dung ... The process converted the lead to lead oxide, and it was then finely ground to form a pigment for white, yellow and red lead paint ...
... The Beatles John Lennon – lead, harmony and backing vocals, rhythm and acoustic guitars, piano, harmonica, tambourine, handclaps 12-string lead guitar on "Every Little ...
... The Lead has to communicate the direction of the movement to the Follow ... Traditionally, the Lead's right hand on the follow's back, near the lowest part of the shoulder-blade ... This is the strongest part of the back and the lead can easily pull the Follow's body inwards ...
... In the human body, lead inhibits porphobilinogen synthase and ferrochelatase, preventing both porphobilinogen formation and the incorporation of iron ... Acute lead poisoning is treated using disodium calcium edetate the calcium chelate of the disodium salt of ethylene-diamine-tetracetic acid (EDTA) ... chelating agent has a greater affinity for lead than for calcium and so the lead chelate is formed by exchange ...
More definitions of "lead":
- (verb): Take somebody somewhere.
Example: "We lead him to our chief"
Synonyms: take, direct, conduct, guide
- (verb): Stretch out over a distance, space, time, or scope; run or extend between two points or beyond a certain point.
Synonyms: run, go, pass, extend
- (noun): The introductory section of a story.
Example: "It was an amusing lead-in to a very serious matter"
- (verb): Travel in front of; go in advance of others.
- (verb): Lead, extend, or afford access.
- (verb): Be conducive to.
Example: "The use of computers in the classroom lead to better writing"
Synonyms: contribute, conduce
- (verb): Be ahead of others; be the first.
- (verb): Tend to or result in.
Example: "This remark lead to further arguments among the guests"
- (noun): An advantage held by a competitor in a race.
Example: "He took the lead at the last turn"
- (verb): Cause to undertake a certain action.
Example: "Her greed led her to forge the checks"
- (noun): (baseball) the position taken by a base runner preparing to advance to the next base.
Example: "He took a long lead off first"
- (noun): Evidence pointing to a possible solution.
Example: "The police are following a promising lead"
Synonyms: track, trail
- (noun): A soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull gray.
Example: "The children were playing with lead soldiers"
Synonyms: Pb, atomic number 82
- (noun): The timing of ignition relative to the position of the piston in an internal-combustion engine.
Synonyms: spark advance
- (noun): Thin strip of metal used to separate lines of type in printing.
- (verb): Move ahead (of others) in time or space.
- (verb): Be in charge of.
- (noun): Restraint consisting of a rope (or light chain) used to restrain an animal.
Synonyms: leash, tether
- (verb): Pass or spend.
Example: "Lead a good life"
- (verb): Cause something to pass or lead somewhere.
- (noun): A position of leadership (especially in the phrase 'take the lead').
Example: "He takes the lead in any group"; "we were just waiting for someone to take the lead"; "they didn't follow our lead"
- (noun): Mixture of graphite with clay in different degrees of hardness; the marking substance in a pencil.
Synonyms: pencil lead
- (noun): A news story of major importance.
Synonyms: lead story
- (noun): An indication of potential opportunity.
Example: "A good lead for a job"
Synonyms: tip, steer, confidential information, wind, hint
- (noun): The playing of a card to start a trick in bridge.
Example: "The lead was in the dummy"
Famous quotes containing the word lead:
“If this bureau had a prayer for use around horse parks, it would go something like this: Lead us not among bleeding-hearts to whom horses are cute or sweet or adorable, and deliver us from horse-lovers. Amen.... With that established, lets talk about the death of Seabiscuit the other night. It isnt mawkish to say, there was a racehorse, a horse that gave race fans as much pleasure as any that ever lived and one that will be remembered as long and as warmly.”
—Walter Wellesley (Red)
“I wander on, and wave my hands,
And sing, and shake my heavy locks.
The grey wolf knows me; by one ear
I lead along the woodland deer;
The hares run by me growing bold.”
—William Butler Yeats (18651939)
“Let them alone: they be blind leaders of the blind. And if the blind lead the blind, both shall fall into the ditch.”
—Bible: New Testament Jesus, in Matthew, 15:14.
Referring to the Pharisees.