(n.) An interception or obscuration of the light of the sun, moon, or other luminous body, by the intervention of some other body, either between it and the eye, or between the luminous body and that illuminated by it. A lunar eclipse is caused by the moon passing through the earth's shadow; a solar eclipse, by the moon coming between the sun and the observer. A satellite is eclipsed by entering the shadow of its primary. The obscuration of a planet or star by the moon or a planet, though of the nature of an eclipse, is called an occultation. The eclipse of a small portion of the sun by Mercury or Venus is called a transit of the planet.
(n.) The loss, usually temporary or partial, of light, brilliancy, luster, honor, consciousness, etc.; obscuration; gloom; darkness.
(v. t.) To cause the obscuration of; to darken or hide; -- said of a heavenly body; as, the moon eclipses the sun.
(v. t.) To obscure, darken, or extinguish the beauty, luster, honor, etc., of; to sully; to cloud; to throw into the shade by surpassing.
(v. i.) To suffer an eclipse.
Example Sentences:
(1) But this achievement was eclipsed by a surge in Labour support.
(2) The data are interpreted, on the basis of available crystallographic structures of chicken mitochondrial aspartate aminotransferase, to indicate that in each case the alteration in 31P chemical shift results from a conformational change in the coenzyme 5' side chain, in which one of the structures involves a near-eclipsed pair of bonds.
(3) The inactivity of these drugs is rationalized in terms of eclipsed pharmacophore configurations and the increased population of unfavorable rotational conformations made possible by the exocyclic position of both pharmacophores.
(4) Greatest efficacy was seen when therapy began early in the infection, presumably while the virus was in its eclipse phase.
(5) I don't mean in the sense that the taxpayer would have to pick up the pieces if it went under, but in the sense that the social networking service has achieved a position of such dominance in the online ecosystem that its eclipse is unthinkable.
(6) The observation in the presence of 2-mercaptoethanol of electrophoretic bands corresponding to trimeric and higher cross-linked polypeptide chain species rules out the alternating ring and confirms the two-layered eclipsed model.
(7) Rescue kinetics of MSV, observed after murine leukemia virus (MuLV) superinfection of these "sarcoma-positive leukemia-negative (S + L -)" mouse 3T3 cells, consisted of a 9- to 12-hr eclipse period followed by simultaneous release of both MSV and MuLV with no evidence for release of infectious MSV prior to the production of progeny MuLV.
(8) It's debatable whether the success of the films has eclipsed the original diaries.
(9) The eclipse period for the A25 phage-host system was found to extend for 34 min, while the C1 phage were found as early as 10 min after infection.
(10) The Prestonpans factory was eclipsed by an even greater one – for a time it boasted the world’s highest chimney – that made bleach and sulphuric acid on the outskirts of Glasgow; and it was in Glasgow that some of the earliest cases of acid violence were recorded.
(11) Osborne had already been eclipsed by Brexiteer Boris Johnson in the hearts of many individual members, who tend to be more Eurosceptic than the Tory party in parliament.
(12) There was such power and experience in Chelsea's ranks that it always felt as if Arsenal's youth and invention might be eclipsed.
(13) It now finds itself within touching distance of becoming the biggest parliamentary force, eclipsing its more moderate rivals in the Labour party and on course to gain at least 30 parliamentary seats.
(14) The Howard-Dolman (H-D) is a version of Howard's stereoacuity test (H) which has almost completely eclipsed the original.
(15) The parainfluenza antigen became detectable by immunofluorescence in the infected cell perinuclear region after a relatively long eclipse period (18 h) and synthetized virus has few RNA and induced no inclusion information in the cytoplasm or the nucleus.
(16) It just eclipsed the end of BBC1's Casualty, which attracted 4.2 million viewers (17.5%) and John Bishop's Britain, which drew 3.4 million viewers (15.2%) across its entire run between 9.15pm and 10.15pm.
(17) "The speed with which the Labour party eclipsed the Liberal party in the early part of the last century was, in large part, because Labour better understood the need for such collectivist responses, especially at a time of war, and an internally divided Liberal party did not."
(18) Although historically the Marxist paradigm went into eclipse during the early twentieth century, the field has developed rapidly during recent years.
(19) She will also go head to head with another ITV export, James Goldston, who has been credited with rejuvenating ABC's Good Morning America, which has eclipsed NBC's Today from its longstanding position at number one in the breakfast ratings war.
(20) An estimated £810m was spent online by British shoppers on Friday, according to internet retail experts IMRG, a figure that eclipsed the £650m splurge predicted for Cyber Monday, and potentially means Boxing Day has been usurped as the biggest shopping day of the year once store sales are taken into account.
Penumbra
Definition:
(n.) An incomplete or partial shadow.
(n.) The shadow cast, in an eclipse, where the light is partly, but not wholly, cut off by the intervening body; the space of partial illumination between the umbra, or perfect shadow, on all sides, and the full light.
(n.) The part of a picture where the shade imperceptibly blends with the light.
Example Sentences:
(1) Our analysis showed that the interpolation errors are proportional to the curvature of the dose distribution and are relatively high in regions on either side of, but not including, the steepest part of the penumbra.
(2) Analysis of the penumbra width of cross dose distributions, as a function of field sizes, allowed us to postulate that the dmax shift could be due to the phantom scattered photons, which in turn were generated by the collimator scattered photons.
(3) If true, this is the first demonstration of the ischemic penumbra by MR imaging and may reflect our use of Wistar rats, a new image analysis technique, and ultra-high resolution MR imaging.
(4) The combination for this applicator of sharp penumbra and low out-of-field dose leads to reduced lung and opposite breast doses.
(5) An extracellular acidosis that occurs in the penumbra zone was investigated in vitro as to its role in the formation of cytotoxic cell swelling.
(6) The ischemic thresholds for the initial increase in CMRG and the complete depletion of ATP content represent the metabolic equivalent of the penumbra zone and provide a basis for the evaluation of therapeutic procedures for the treatment of stroke.
(7) If the entire cross-section is blocked, the point will be in the umbra of the shadow; if only a portion of the light is blocked, the point will be in the penumbra of the shadow.
(8) The mechanisms involved in this sequence of events and the role of pH changes in the development of the so-called "ischaemic penumbra" are discussed.
(9) In the light of these findings, we suggest that use of a selective antagonist of LTs may be helpful in reducing the ischemic penumbra during acute cerebral ischemia by controlling the vasogenic edema.
(10) Opening the hinge adjustment restores field flatness, without changing penumbra or the inverse square law behavior of the teletherapy unit.
(11) The area of "penumbra" could be estimated in regions with CBF value just above this threshold.
(12) In the penumbra zone, comparable trends were noted in OER and CMRO2 but the difference in the changes between the two groups did not reach statistical significance.
(13) The agreement is within experimental errors both in the penumbra region and along the central ray of the asymmetric field.
(14) These results confirm the concept of a metabolic penumbra.
(15) These wedges were designed to increase the penumbra width at the field junction from about 1.5 to about 3.5 cm, to achieve dose uniformity.
(16) These studies suggest that 1) the expression of 72-kd heat-shock protein in neurons precedes the development of ischemic cellular alterations detectable by conventional hematoxylin and eosin light microscopy methods; 2) there is a hierarchy of cell types and anatomic sites that express 72-kd heat-shock protein, and this hierarchy reflects cellular and anatomic vulnerability to ischemic cell damage; and 3) 72-kd heat-shock protein induction in neurons bordering a necrotic ischemic core may be the morphological equivalent of the ischemic penumbra.
(17) While within the penumbra, some direct sunlight falls on the Moon but little darkening of the disc will be noticed until a few minutes before the Moon begins to enter the umbra at 19:23.
(18) Measurements with the diode interfaced to an X-Y recorder required only a fraction of the time required with the chambers, minimizing error due to change in machine output, and permitted resolution of isodose lines in the penumbra.
(19) A typical spot has a central dark umbra, surrounded by a lighter penumbra.
(20) The rate in the penumbra differed (P = .01) from that in the predicted low-dose region, where scotoma did not increase with time.