What's the difference between ledge and wedge?

Ledge


Definition:

  • (n.) A shelf on which articles may be laid; also, that which resembles such a shelf in form or use, as a projecting ridge or part, or a molding or edge in joinery.
  • (n.) A shelf, ridge, or reef, of rocks.
  • (n.) A layer or stratum.
  • (n.) A lode; a limited mass of rock bearing valuable mineral.
  • (n.) A piece of timber to support the deck, placed athwartship between beams.

Example Sentences:

  • (1) This bony strut reduces inferomedial displacement of the muscle cone and provides a medial supporting "ledge" in cases requiring late orbital reconstruction.
  • (2) The continuous ledge will be covered with a cast continuous bar, intended to restore the lingual crown morphology.
  • (3) The number of two-year sojourns in a hospital and other data are reported on the basis of an evaluation of the signature ledges of the clinical histories in the district Dresden.
  • (4) In April 2001, he secured the con- viction of Klan member Thomas Blanton for driving the men to the church in the middle of the night to lay a dozen sticks of dynamite on the window ledge.
  • (5) The ledges of some pleats partly grow toward each other as ring like diaphragms, leaving openings whose boundary is composed of alveolar epithelium separated by a basal lamina from a connective tissue sheath with capillaries.
  • (6) All the determinants for ledging were not identified with this study, and further research is indicated.
  • (7) In the outer and middle layers of the spiny deposits, the Ca, P, and Mg concentrations were all significantly higher than those of the ledge-type deposits.
  • (8) Calculus components of the ledge-type deposits contained crystal types quite similar to sandy grain-shaped hydroxyapatite (HAP), plate-shaped octacalcium phosphate (OCP), and hexahedral Mg-containing whitlockite (WHT).
  • (9) Geologists sort the waterfalls into two types: wedding-cake falls, which descend in multiple tiers, and bridal-veil falls, that plunge over a ledge into a pool.
  • (10) Ridge POAMES occurred most frequently, followed by combined, ledge and the nodular exostose types.
  • (11) The edges of the breaks appear clinically as glassy ridges or ledges and are also called Haab's lines.
  • (12) 15 had a significantly higher incidence of ledging.
  • (13) Hypoplasia of the labial enamel of 15 out of 19 teeth from sheep killed after recovery from the infection was classified according to the extent and depth as pits, grooves or larger areas of missing enamel with ledge-formation cervically.
  • (14) Immature spores in the strain studied had a ledge which disappeared during maturation.
  • (15) Shaping effectiveness of the tested files was qualitatively evaluated in terms of respect for conservation of the apical constriction and the presence or absence of ledging, specially in the apical third of the root canals.
  • (16) By following the continental ledge in search of sardines, sardinella, and mackerel, it hopes to catch 3,000 tonnes of fish in a four- to six-week voyage before it offloads them, possibly in Las Palmas in the Canary Islands.
  • (17) This preliminary study suggests that such a wheelchair feature might improve the safety of wheelchairs in conditions involving inadvertent loss of caster support, as when they drop off a stair or ledge.
  • (18) A complicated system of low lying slanting, diagonal mucosal ledges forms between the tall longitudinal folds.
  • (19) Ten of the 107 had small enamel fractures, primarily occurring on cingulum ledges.
  • (20) Each of the nine objects was placed on a ledge inside a dummy television screen next to the video screen, the food items alternating with the neutral objects, and 20 female patients with anorexia nervosa and 20 female controls matched for age were asked to adjust the size of the video recording to that of the real object.

Wedge


Definition:

  • (n.) A piece of metal, or other hard material, thick at one end, and tapering to a thin edge at the other, used in splitting wood, rocks, etc., in raising heavy bodies, and the like. It is one of the six elementary machines called the mechanical powers. See Illust. of Mechanical powers, under Mechanical.
  • (n.) A solid of five sides, having a rectangular base, two rectangular or trapezoidal sides meeting in an edge, and two triangular ends.
  • (n.) A mass of metal, especially when of a wedgelike form.
  • (n.) Anything in the form of a wedge, as a body of troops drawn up in such a form.
  • (n.) The person whose name stands lowest on the list of the classical tripos; -- so called after a person (Wedgewood) who occupied this position on the first list of 1828.
  • (v. t.) To cleave or separate with a wedge or wedges, or as with a wedge; to rive.
  • (v. t.) To force or drive as a wedge is driven.
  • (v. t.) To force by crowding and pushing as a wedge does; as, to wedge one's way.
  • (v. t.) To press closely; to fix, or make fast, in the manner of a wedge that is driven into something.
  • (v. t.) To fasten with a wedge, or with wedges; as, to wedge a scythe on the snath; to wedge a rail or a piece of timber in its place.
  • (v. t.) To cut, as clay, into wedgelike masses, and work by dashing together, in order to expel air bubbles, etc.

Example Sentences:

  • (1) It is suggested that the normal cyclical release of LH is inhibited in PCO disease by a negative feedback by androgens to the hypothalamus or the pituitary, and that wedge resection should be reserved for patients in whom other forms of treatment have failed.
  • (2) An opening wedge osteotomy is then directed posterior-dorsal to anterior-plantar, to effectively plantarflex the posterior aspect of the calcaneus.
  • (3) Lisinopril increases cardiac output, and decreases pulmonary capillary wedge pressure and mean arterial pressure in patients with congestive heart failure refractory to conventional treatment with digitalis and diuretics.
  • (4) It was then determined whether reducing the PA wedge pressure during exercise with prazosin (9 patients) or dobutamine (6 patients) reduced ventilatory levels toward normal.
  • (5) He elaborates: "Republicans use powerful economic wedge issues to great impact.
  • (6) The method described uses film DOT-I and DOT-II by Dupont, whereby the exposure of the step wedge takes place on a linear accelerator with a photo energy of 10 MeV.
  • (7) Indirect methods to evaluate left ventricular function included the use of the Swan-Ganz catheter for pulmonary capillary wedge pressure measurement, systolic time intervals, and cardiac output.
  • (8) We performed carinal reconstruction in eight patients, sleeve pneumonectomy in eight patients and wedge pneumonectomy in one.
  • (9) The mitral valve area was less than 1 cm2 in 61%, the wedge pressure over 25 mmHg in 59% and the pulmonary artery systolic pressure over 50 mmHg in 59%.
  • (10) Lungs were evaluated for the presence of wedge-shaped pleural-based densities and for the presence of an associated vascular sign.
  • (11) The isodose curves exhibited the desired wedge angles over the range of field sizes from 5 x 5 to 15 x 40 cm.
  • (12) This is contradicted, however, by maintained blood pressure and pulmonary capillary wedge pressure, increased cardiac output, and reduced peripheral resistance.
  • (13) Early complications included disc entrapment against the ventricular wall in three cases, wedging of chorda between disc and valve rim in two and posterior perforation of the left ventricle in three patients.
  • (14) Meanwhile, among hepatic and systemic hemodynamics, wedged hepatic venous pressure, hepatic venous pressure gradient, free hepatic venous pressure, cardiac index, systolic blood pressure, systemic vascular resistance, and stroke volume were found to have changed significantly after tilting.
  • (15) Cardiac disorders being usually concomitant with this syndrome (interventricular leak, pulmonary arterial wedge stenosis etc.)
  • (16) As an initial feasibility study of computer-controlled radiation therapy, its application to produce wedge-shaped dose distributions by moving the collimator jaws has been evaluated.
  • (17) Five shoulders had a posterior opening-wedge osteotomy of the scapular neck to correct the excessive retroversion of the glenoid cavity.
  • (18) The results showed a satisfactory inter- and intraobserver agreement for wedge (Kappa = 0.72 and 0.90) and compression fractures (Kappa = 0.60 and 0.92).
  • (19) Among 28 patients with chronic obstructive pulmonary disease (COPD) with increasing dyspnea, the resting mean pulmonary arterial wedge pressure was elevated (greater than 12mm Hg) in 4 and became abnormal with exercise in 3 other subjects.
  • (20) After induction of spinal anaesthesia the mean arterial pressure, right atrial pressure, pulmonary capillary wedge pressure and systemic vascular resistance were significantly reduced.