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:
... 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 ...
... 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 Thing" Paul McCartney – lead, harmony ...
... In the human body, lead inhibits porphobilinogen synthase and ferrochelatase, preventing both porphobilinogen formation and the incorporation of iron into protoporphyrin ... 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 ...
... 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 ...
More definitions of "lead":
- (noun): (baseball) the position taken by a base runner preparing to advance to the next base.
Example: "He took a long lead off first"
- (verb): Be ahead of others; be the first.
- (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): Pass or spend.
Example: "Lead a good life"
- (verb): Cause to undertake a certain action.
Example: "Her greed led her to forge the checks"
- (verb): Be in charge of.
- (noun): Thin strip of metal used to separate lines of type in printing.
- (noun): Restraint consisting of a rope (or light chain) used to restrain an animal.
Synonyms: leash, tether
- (verb): Tend to or result in.
Example: "This remark lead to further arguments among the guests"
- (noun): Mixture of graphite with clay in different degrees of hardness; the marking substance in a pencil.
Synonyms: pencil lead
- (verb): Take somebody somewhere.
Example: "We lead him to our chief"
Synonyms: take, direct, conduct, guide
- (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).
- (noun): The playing of a card to start a trick in bridge.
Example: "The lead was in the dummy"
- (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"
- (verb): Be conducive to.
Example: "The use of computers in the classroom lead to better writing"
Synonyms: contribute, conduce
- (noun): The introductory section of a story.
Example: "It was an amusing lead-in to a very serious matter"
- (verb): Lead, extend, or afford access.
- (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): An advantage held by a competitor in a race.
Example: "He took the lead at the last turn"
- (verb): Cause something to pass or lead somewhere.
- (noun): An indication of potential opportunity.
Example: "A good lead for a job"
Synonyms: tip, steer, confidential information, wind, hint
- (verb): Travel in front of; go in advance of others.
- (noun): Evidence pointing to a possible solution.
Example: "The police are following a promising lead"
Synonyms: track, trail
- (verb): Move ahead (of others) in time or space.
- (noun): The timing of ignition relative to the position of the piston in an internal-combustion engine.
Synonyms: spark advance
Famous quotes containing the word lead:
“Boys and bad hunters had known what to do
With stone and lead to unprotected glass:
Shatter it inward on the unswept floors.”
—Robert Frost (18741963)
“In fact what America expects of its citizens and what the Catholic Church expects of the faithful are sometimes so different that they lead to an enormous ker-KLUNK between democracy and theology.”
—Anna Quindlen (b. 1952)
“Dance then wherever you may be,
I am the Lord of the Dance, said he,
And Ill lead you all, wherever you may be
And Ill lead you all in the dance, said he.”
—Sydney Carter (b. 1915)