(n.) The conical shadow projected from a planet or satellite, on the side opposite to the sun, within which a spectator could see no portion of the sun's disk; -- used in contradistinction from penumbra. See Penumbra.
(n.) The central dark portion, or nucleus, of a sun spot.
(n.) The fainter part of a sun spot; -- now more commonly called penumbra.
(n.) Any one of several species of sciaenoid food fishes of the genus Umbrina, especially the Mediterranean species (U. cirrhosa), which is highly esteemed as a market fish; -- called also ombre, and umbrine.
Example Sentences:
(1) 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.
(2) The frequency of chromosome aberrations was measured in cultured Umbra limi heart (U1-H) and Chinese hamster ovary (CHO) cells following exposure to the polycyclic aromatic hydrocarbons (PAH) 3,4-benzopyrene (BP), 1,2,5,6-dibenzanthracene (DBA), 1,2-benzanthracene (BA), and pyrene (PY), activated using S9 prepared from rainbow trout liver.
(3) 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.
(4) On that occasion, the Moon traversed the northern part of the umbra and its southern regions, which just missed the shadow's core, are relatively dark.
(5) A typical spot has a central dark umbra, surrounded by a lighter penumbra.
(6) Due to the very limited amount of knowledge available on the cytochemistry and architecture of fish chromosomes, an extensive banding study was carried out on chromosomes of the central mudminnow, Umbra limi.
(7) The mudminnow, Umbra pygmaea, was chosen for this study, because of its ideal karyotype of 22 large chromosomes.
(8) Artificial "calculus", consisting of a mixture of shellac, umbra, pumice and plaster dissolved in ethanol, was painted on the root surfaces.
(9) The Moon stands over the southern Indian Ocean as it passes through the central dark umbra of the Earth's shadow, plunging deeper into the shadow than during any eclipse since 2000.
(10) It was concluded that the chromosomes of Umbra limi displayed typical responses to low level radiation exposure and that this fish would be an ideal cytogenetics model for this study of induced chromosome aberrations in fishes.
(11) The Moon's W limb has withdrawn from the umbra by 23:02 and finally exits the penumbra at 00:01.
(12) Totality, with the Moon entirely within the umbra, lasts from 20:22 until 22:03 with mid eclipse at 21:13.
(13) An in vivo system for the detection of sister chromatid exchange (SCE) in the central mudminnow, Umbra limi, is presented.
(14) A parasite of Plica plica in Guyana, previously called P. cnemidophori, is designated P. guyannense, while identification of Plica umbra parasites as P. tropiduri is corrected to P. vacuolatum and Fallisia simplex.
(15) The umbra is not illuminated evenly, though, since less of this indirect light penetrates to its core and the amount reaching different zones of the umbra is affected by varying atmospheric conditions.
(16) nov. from Plica umbra of Guyana; P. minasense tegui subsp.
(17) In the second type, motor activity was observed at any time; this type of periodism was typical of the dogfish Squalus acanthias and the hunchback Sciaena umbra.
(18) The central mudminnow, Umbra limi, was chosen fro this study because of its ideal karyotype consisting of 22 large meta- and submetacentric chromosomes.
(19) Observers in SE England may just glimpse the end of totality, but most of us may see nothing until it begins to emerge from the umbra.
(20) Mudminnows (Umbra pygmaea) and gar (Lepisosteus platyrhincus) were quite tolerant of exposure to acidic waters.
Umbrella
Definition:
(n.) A shade, screen, or guard, carried in the hand for sheltering the person from the rays of the sun, or from rain or snow. It is formed of silk, cotton, or other fabric, extended on strips of whalebone, steel, or other elastic material, inserted, or fastened to, a rod or stick by means of pivots or hinges, in such a way as to allow of being opened and closed with ease. See Parasol.
(n.) The umbrellalike disk, or swimming bell, of a jellyfish.
(n.) Any marine tectibranchiate gastropod of the genus Umbrella, having an umbrella-shaped shell; -- called also umbrella shell.
Example Sentences:
(1) The unauthorised trades remained hidden for years in so-called umbrella accounts set up to store the funds.
(2) The first eigenvector, when represented by grey scale maps depicting a pair of eyes, reveals that, as average threshold increases, the visual field rises and flattens, like an umbrella that, initially closed, is simultaneously opened and thrust upwards.
(3) A full marching band moved through a sea of umbrellas, playing the Les Miserables song Do You Hear the People Sing.
(4) Yau, an “umbrella soldier” , ran in local district council elections for the first time in November 2015, unsuccessfully challenging the pro-Beijing lawmaker Priscilla Leung Mei-fun to whom she lost by just over 300 votes.
(5) It sounds like self-congratulation for disbelieving incorrect forecasts of rain, then proudly stepping into a hailstorm without an umbrella.
(6) Follow-up of 31 patients discharged with devices in place, for a total of 31 patient-years, has yielded no umbrella-related complications.
(7) Most are members of existing rebel battalions or groups who decided to come under the Liwa al-Ummah umbrella; others signed up as individuals ...
(8) Rashkind's "double umbrella" technique for percutaneous transcatheter occlusion of patent arterial duct (ductus arteriosus) has been used successfully in several centres.
(9) The project is an umbrella project with three main subprojects and several satellite projects.
(10) Chris Breen from the Refugee Advocacy Network, an umbrella organisation of asylum seeker groups responsible for organising the Melbourne rally, said the speakers all called for an end to offshore processing.
(11) This is a consequence of the government reducing funding for the new work programme by 80%, according to a major report to be published by the umbrella group for the companies on the programme.
(12) Staff battled the rays with an assortment of big umbrellas and pot plants, before covering the entire 57-storey glass wall with non-reflective film – the likely solution in London.
(13) Members of the Syrian National Council (SNC) said it would be an umbrella group for opposition groups inside and outside the country and a vehicle for democratic change.
(14) Google Now can work only if the company behind it manages to bring vast chunks of our existence – from communication to travel to reading – under its corporate umbrella.
(15) The rebel groups, including at least three considered to be under the FSA umbrella, called on Tuesday for the rebel forces to be reorganized under an Islamic framework and to be run only by groups fighting inside Syria.
(16) Joshua Wong, the teenage activist who was one of the most recognisable faces of Hong Kong’s umbrella movement protests, has been found guilty of “illegal assembly” by a court in the former British colony.
(17) Golf balls, bottles, fireworks, umbrellas and even cast iron rain gutter was thrown at republicans marching along Royal Avenue.
(18) Britain Umbrella sales have surged as the economy remains under the weather.
(19) The regime has sought to deploy thousands of local militiamen under the umbrella of what it calls the National Defence Forces, using them as shock troops directed by the army.
(20) We experienced a case of acute myocardial infarction with ventricular aneurysm secondary to nonpenetrating chest trauma by an umbrella tip and wish to report this unusual case, along with a review of the literature.