What's the difference between lead and leaden?

Lead


Definition:

  • (n.) An open way in an ice field.
  • (n.) A lode.
  • (n.) 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.
  • (n.) An article made of lead or an alloy of lead
  • (n.) A plummet or mass of lead, used in sounding at sea.
  • (n.) A thin strip of type metal, used to separate lines of type in printing.
  • (n.) Sheets or plates of lead used as a covering for roofs; hence, pl., a roof covered with lead sheets or terne plates.
  • (n.) A small cylinder of black lead or plumbago, used in pencils.
  • (v. t.) To cover, fill, or affect with lead; as, continuous firing leads the grooves of a rifle.
  • (v. t.) To place leads between the lines of; as, to lead a page; leaded matter.
  • (v. t.) To guide or conduct with the hand, or by means of some physical contact connection; as, a father leads a child; a jockey leads a horse with a halter; a dog leads a blind man.
  • (v. t.) 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.
  • (v. t.) To conduct or direct with authority; to have direction or charge of; as, to lead an army, an exploring party, or a search; to lead a political party.
  • (v. t.) To go or to be in advance of; to precede; hence, to be foremost or chief among; as, the big sloop led the fleet of yachts; the Guards led the attack; Demosthenes leads the orators of all ages.
  • (v. t.) To draw or direct by influence, whether good or bad; to prevail on; to induce; to entice; to allure; as, to lead one to espouse a righteous cause.
  • (v. t.) To guide or conduct one's self in, through, or along (a certain course); hence, to proceed in the way of; to follow the path or course of; to pass; to spend. Also, to cause (one) to proceed or follow in (a certain course).
  • (v. t.) To begin a game, round, or trick, with; as, to lead trumps; the double five was led.
  • (v. i.) To guide or conduct, as by accompanying, going before, showing, influencing, directing with authority, etc.; to have precedence or preeminence; to be first or chief; -- used in most of the senses of lead, v. t.
  • (v. t.) 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.
  • (n.) The act of leading or conducting; guidance; direction; as, to take the lead; to be under the lead of another.
  • (n.) 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.
  • (n.) 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.
  • (n.) The course of a rope from end to end.
  • (n.) 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.
  • (n.) the distance of haul, as from a cutting to an embankment.
  • (n.) The action of a tooth, as a tooth of a wheel, in impelling another tooth or a pallet.

Example Sentences:

  • (1) Thirty-two patients (10 male, 22 female; age 37-82 years) undergoing maintenance haemodialysis or haemofiltration were studied by means of Holter device capable of simultaneously analysing rhythm and ST-changes in three leads.
  • (2) Herpesviruses such as EBV, HSV, and human herpes virus-6 (HHV-6) have a marked tropism for cells of the immune system and therefore infection by these viruses may result in alterations of immune functions, leading at times to a state of immunosuppression.
  • (3) LHRH therapy leads to higher plasma LH levels and a lower FSH in response to an intravenous LHRH test.
  • (4) These results demonstrate that increased availability of galactose, a high-affinity substrate for the enzyme, leads to increased aldose reductase messenger RNA, which suggests a role for aldose reductase in sugar metabolism in the lens.
  • (5) These are typically runaway processes in which global temperature rises lead to further releases of CO², which in turn brings about more global warming.
  • (6) Results indicated a .85 probability that Directive Guidance would be followed by Cooperation; a .67 probability that Permissiveness would lead to Noncooperation; and a .97 likelihood that Coerciveness would lead to either Noncooperation or Resistance.
  • (7) It would be fascinating to see if greater local government involvement in running the NHS in places such as Manchester leads over the longer term to a noticeable difference in the financial outlook.
  • (8) The Frenchman’s 65th-minute goal was a fifth for United and redemptive after he conceded the penalty from which CSKA Moscow took a first-half lead.
  • (9) Our results indicate that increasing the delay for more than 8 days following irradiation and TCD syngeneic BMT leads to a rapid loss of the ability to achieve alloengraftment by non-TCD allogeneic bone marrow.
  • (10) report the complications registered, in particular: lead's displacing 6.2%, run away 0.7%, marked hyperthermya 0.0%, haemorrage 0.4%, wound dehiscence 0.3%, asectic necrosis by decubitus 5%, septic necrosis 0.3%, perforation of the heart 0.2%, pulmonary embolism 0.1%.
  • (11) The availability and success of changes in reproductive technology should lead to a reappraisal of the indications for hysterectomy, especially in young women.
  • (12) Photoirradiation of F1 in the presence of the analog leads to inactivation depending linearly on the incorporation of label.
  • (13) In patients with coronary artery disease, electrocardiographic signs of left atrial enlargement (LAE-negative P wave deflection greater than or equal to 1 mm2 in lead V1) are associated with increased left ventricular end diastolic pressure (LVEDP).
  • (14) The new Somali government has enthusiastically embraced the new deal and created a taskforce, bringing together the government, lead donors (the US, UK, EU, Norway and Denmark), the World Bank and civil society.
  • (15) Suggested is a carefully prepared system of cycling videocassettes, to effect the dissemination of current medical information from leading medical centers to medical and paramedical people in the "bush".
  • (16) Mitonafide is the lead compound of a new series of antitumor drugs, the 3-Nitronaphthalimides, which have shown antineoplastic activity in vitro as well as in vivo.
  • (17) The presently available data allow us to draw the following conclusions: 1) G proteins play a mediatory role in the transmission of the signal(s) generated upon receptor occupancy that leads to the observed cytoskeletal changes.
  • (18) In the case presented, overdistension of a jejunostomy catheter balloon led to intestinal obstruction and pressure necrosis (of the small bowel), with subsequent abscess formation leading to death from septicemia.
  • (19) This is rapidly followed by a gamut of changes leading to demyelination.
  • (20) In crosses between inverted repeats, a single intrachromatid reciprocal exchange leads to inversion of the sequence between the crossover sites and recovery of both genes involved in the event.

Leaden


Definition:

  • (a.) Made of lead; of the nature of lead; as, a leaden ball.
  • (a.) Like lead in color, etc. ; as, a leaden sky.
  • (a.) Heavy; dull; sluggish.

Example Sentences:

  • (1) There is a heavy, leaden feeling in your chest, rather as when someone you love dearly has died; but no one has – except, perhaps, you.
  • (2) In ancient Rome and during the Renaissance compression by means of leaden plates was a well-known treatment of cancer.
  • (3) DCMS secretary Maria Miller last week promised to fight for the arts: untouched by loftier values her leaden utilitarianism in calling the arts a "compelling product" came under fire, but she did lay out a good commercial case.
  • (4) There is no way that the show could have been made without it, because otherwise all the action would have been leaden with exposition.
  • (5) The murine dilute suppressor gene, dsu, was previously shown to suppress the dilute coat color phenotypes of mice homozygous for the dilute (d), leaden (ln), and ashen (ash) mutations.
  • (6) Sixty patients with probable atypical depression--defined as meeting Research Diagnostic Criteria for depressive illness, having reactive mood, and having one of four associated symptoms (hyperphagia, hypersomnolence, leaden feeling, and sensitivity to rejection)--took part in a study contrasting phenelzine, imipramine, and placebo.
  • (7) The football was leaden in the first half and, once again, there were times when an impatient crowd struggled to contain their frustrations.
  • (8) The syndrome is characterized by profound dysfunction of the central nervous system, silver-leaden colored hair, abnormal melanosomes and melanocytes, and abnormal inclusion bodies in fibroblasts, bone marrow histiocytes and lymphocytes which appear to represent abnormal lysosomal bodies.
  • (9) In addition, scatter radiation exposure of the head decreased by 54% by covering the patient with a rubber leaden blanket (0.25 mm Pb).
  • (10) They left as the leaden sun started to dip; federal police stretched yellow crime scene tape around the sites.
  • (11) 6.08pm BST 36 min: A leaden-footed touch from Weimann puts the ball out of play deep in Liverpool territory, surrendering possession to the visitors in the form of a throw-in.
  • (12) The hour struck, 9.17pm, and leaden silence fell, broken only by the babble of TV reporters beside their mobile trucks.
  • (13) In the fifteenth his legs were leaden; Frazier punished him immediately and before the round had gone a minute a sickeningly violent left hook smashed across the right side of Ali's face, instantly increasing the swelling that had developed there earlier and lifting him flat on his back with his legs kicking high towards the ring lights.
  • (14) If it’s just going to be leaden, and heavy, and bureaucratic, we will lose out.” Speaking to the Guardian as the CBI launches a new report analysing the factors that make some regions more economically successful than others, Fairbairn urged the government to invest more in boosting school standards in order to help address the financial concerns that led to Brexit.
  • (15) 9.13pm BST 12 min: A leaden touch from Jerome Boateng on the edge of his own penalty area puts Per Mertesacker under pressure from Slimani, but the German centre-half clears.
  • (16) As sendoffs go, it is probably fair to say Roy Hodgson hoped for better in England’s final match before Euro 2016 than seeing his team look so leaden, the crowd so bored they resorted to making their own entertainment and a tetchy press conference when the questions centred around whether his team were heading into another tournament without any clarity about their best way of playing.
  • (17) Dowsett set off at positively leaden pace in the opening lap and a half but once he hit cruising speed, he maintained the same even pace throughout, covering most of his laps in about 17sec, raising his game approaching the half-hour and pushing hard in the final 15 minutes.
  • (18) 14 min: A decent scoring opportunity for Brazil goes to waste after a disappointingly leaden-footed touch from Neymar, who is sporting an interesting mohawk type barnet that makes him resemble a toilet brush.
  • (19) Through the leaden rain of a battleship-grey morning in one of the poorest neighbourhoods in Britain drifts a flurry of music by Antonio Vivaldi.
  • (20) An enhanced development of pituitary tumors was observed in virgin female mice of the C57 Leaden strain following repeated oral administration of synthetic progestins.