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.
Read more about Lead.
Some articles on 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 Thing" Paul McCartney – lead, harmony and ...
... 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 into protoporphyrin IX, the final ... Acute lead poisoning is treated using disodium calcium edetate the calcium chelate of the disodium salt of ethylene-diamine-tetracetic acid (EDTA) ... This chelating agent has a greater affinity for lead than for calcium and so the lead chelate is formed by exchange ...
... substitute for lemon yellow 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 ...
More definitions of "lead":
- (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
- (verb): Lead, extend, or afford access.
- (verb): Move ahead (of others) in time or space.
- (noun): Mixture of graphite with clay in different degrees of hardness; the marking substance in a pencil.
Synonyms: pencil lead
- (noun): Evidence pointing to a possible solution.
Example: "The police are following a promising lead"
Synonyms: track, trail
- (noun): A news story of major importance.
Synonyms: lead story
- (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): Be in charge of.
- (verb): Pass or spend.
Example: "Lead a good life"
- (noun): The angle between the direction a gun is aimed and the position of a moving target (correcting for the flight time of the missile).
- (verb): Tend to or result in.
Example: "This remark lead to further arguments among the guests"
- (verb): Take somebody somewhere.
Example: "We lead him to our chief"
Synonyms: take, direct, conduct, guide
- (noun): Thin strip of metal used to separate lines of type in printing.
- (verb): Cause to undertake a certain action.
Example: "Her greed led her to forge the checks"
- (noun): Restraint consisting of a rope (or light chain) used to restrain an animal.
Synonyms: leash, tether
- (noun): The introductory section of a story.
Example: "It was an amusing lead-in to a very serious matter"
- (noun): An advantage held by a competitor in a race.
Example: "He took the lead at the last turn"
- (noun): The timing of ignition relative to the position of the piston in an internal-combustion engine.
Synonyms: spark advance
- (verb): Travel in front of; go in advance of others.
- (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
- (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): An indication of potential opportunity.
Example: "A good lead for a job"
Synonyms: tip, steer, confidential information, wind, hint
- (noun): (baseball) the position taken by a base runner preparing to advance to the next base.
Example: "He took a long lead off first"
Famous quotes containing the word lead:
“A quibble is to Shakespeare what luminous vapours are to the traveller: he follows it at all adventures; it is sure to lead him out of his way and sure to engulf him in the mire.”
—Samuel Johnson (17091784)
“Although adults have a role to play in teaching social skills to children, it is often best that they play it unobtrusively. In particular, adults must guard against embarrassing unskilled children by correcting them too publicly and against labeling children as shy in ways that may lead the children to see themselves in just that way.”
—Zick Rubin (20th century)
“Being prime minister is a lonely job.... you cannot lead from the crowd.”
—Margaret Thatcher (b. 1925)