(n.) Usually a curved member made up of separate wedge-shaped solids, with the joints between them disposed in the direction of the radii of the curve; used to support the wall or other weight above an opening. In this sense arches are segmental, round (i. e., semicircular), or pointed.
(n.) A flat arch is a member constructed of stones cut into wedges or other shapes so as to support each other without rising in a curve.
(n.) Any place covered by an arch; an archway; as, to pass into the arch of a bridge.
(n.) Any curvature in the form of an arch; as, the arch of the aorta.
(v. t.) To cover with an arch or arches.
(v. t.) To form or bend into the shape of an arch.
(v. i.) To form into an arch; to curve.
(a.) Chief; eminent; greatest; principal.
(a.) Cunning or sly; sportively mischievous; roguish; as, an arch look, word, lad.
(n.) A chief.
Example Sentences:
(1) Excessive lip protrusion was eliminated, and arch leveled.
(2) The temperature increased from the anterior to the posterior region on both buccal and lingual sides of both arches.
(3) Administration of one of the precursors of noradrenaline l-DOPA not only prevented the decrease in tissue noradrenaline content in myocardium, but restored completely its reserves, exhausted by electrostimulation of the aortic arch.
(4) A forty-four-year-old woman with Takayasu's arteritis and involvement of the aortic arch and its main branches complained of precordial pain on effort.
(5) Koons provoked a bigger stir with the news that he would be showing with gallery owner David Zwirner next year in an apparent defection from Zwirner's arch-rival Larry Gagosian, the world's most powerful art dealer.
(6) Global 'abnormality', hunching (rigid arching of back), hindlimb abduction, forepaw myoclonus, stereotyped lateral head movements, backing, and immobility occurred significantly only in drug-treated rats.
(7) Between March 1986 and September 1988, 38 patients underwent extended aortic resection (aortic valve, ascending aorta, and arch) for acute type-A aortic dissection with aortic valve insufficiency; deep hypothermia and circulatory arrest were used.
(8) Other associated malformations were an interrupted aortic arch and an atrial septal defect.
(9) The sucker, covered with basal lamina, has a constant volume; its layer of muscles resists deformation and supports the stability of the arch.
(10) In the anaesthetized dog the carotid sinuses and aortic arch were isolated from the circulation and separately perfused with blood by a method which enabled the mean pressure, pulse pressure and pulse frequency to be varied independently in each vasosensory area.
(11) The data presented in this paper confirm the need for stimulation of the pudendal reflex arch to achieve physiological conditions.
(12) This article describes the application and efficacy of the lipbumper used in the lower arch.
(13) Adjustment of posterior arch width and dental alignment, using semi-rapid maxillary expansion by means of an upper removable appliance, to co-ordinate the anticipated positions for the arches.
(14) The most commonly associated lesions were ventricular septal defect (50%), hypoplastic aortic arch (45%), patent ductus arteriosus (41%), transposition of great arteries (22.7%) and other intracardiac lesions comprised 30%.
(15) This malformation was demonstrated in alcian-blue- and alizarin-red-stained fetal skeletons by measurements of the distance between the cartilaginous ends of each vertebral arch.
(16) No correlation was found between aortic arch size and the size of the left-to-right shunt in cases of DAP.
(17) After 48 hours in culture, all specimens were examined at 6x magnification for defects in the facial arches, head fold, and neural tube fusion.
(18) Narrow paths weave among moss-covered ornate arches and towers on the 80-acre site, and huge abstract sculptures and staircases lead nowhere, but up to the sky.
(19) Although different dimensions of the face and head and the upper dental arch width were found to be significantly correlated in children with normal occlusion, this relationship is not found to be strong enough in children with different categories of malocclusion.
(20) We suggest that incomplete development of the bones of the dorsal neural arches of the upper sacrum may be a marker of incomplete neurogenesis of the sacral nerves.
Keystone
Definition:
(n.) The central or topmost stone of an arch. This in some styles is made different in size from the other voussoirs, or projects, or is decorated with carving. See Illust. of Arch.
Example Sentences:
(1) If these is the case the Ir gene (genes) would be the Keystone for maintaining the preferential associations of some pseudoalleles in some haplotypes.
(2) Oil carried by Keystone will displace heavy crude from Venezuela, Nigeria and other countries that also contribute to global warming, Pourbaix said.
(3) The bill, voted through a panel of the house energy and power subcommittee, would compel Obama to over-rule demands for a further review of the project from the Environmental Protection Agency (EPA), and disregard local opposition to the Keystone XL pipeline from landowners along its 1,700-mile route.
(4) But two key Liberal positions, on the Keystone XL and on emissions reductions targets, put Trudeau out of step with Obama, who has made climate change the signature issue of his second term in the White House.
(5) Former hedge fund manager Tom Steyer took out television ads on Tuesday, the night of Obama's state of the union address , attacking Keystone XL, and other wealthy Democratic donors wrote open letters to the White House seeking to shut down the project.
(6) Now that the State Department has just released a final environmental impact report on Keystone XL, which appears to downplay the threat, and greatly increases the odds that the Obama administration will approve the project, I feel I must weigh in once again.
(7) Environmental activists opposed to the Keystone XL tar sands pipeline project protest outside the White House in Washington.
(8) On the campaign trail, however, Clinton had claimed it would be inappropriate to express her views on Keystone given her recent service in Barack Obama’s administration.
(9) The system should include two prehospital and two hospital levels, and the highest level being the keystone of the whole.
(10) A Nebraska court has signed off on the proposed route for the Keystone XL, bringing the controversial project a crucial step closer to reality after six years of legal and political fighting.
(11) The choice President Obama has faced in recent weeks – whether to approve the Keystone XL pipeline – has been framed as a choice between losing the support of environmentalists or alienating America's key ally, Canada.
(12) The company behind the Keystone XL pipeline has asked for its US permit application to be put on hold – a move that would leave the final decision on the controversial tar sands oil project to Barack Obama’s successor.
(13) What makes the Keystone XL pipeline different is the scale – and politics.
(14) One way TransCanada might get around what Clinton called the Keystone “distraction” and pump more tar sands crude into the US might be the Upland pipeline, which the Natural Resources Defense Council (NRDC) has termed a “mini Keystone” .
(15) The virions of CE group viruses (CE, Jamestown Canyon, Keystone, LAC, Melao, SSH, TVT, TAH viruses and South River, an unregistered virus) have three major viral polypeptides, designated G1, G2, and N.
(16) And we saw the Assad regime as the keystone in that arc.
(17) We look forward to the debate and ultimately a decision by the US administration to build Keystone XL,” the company said in a statement.
(18) Greenpeace UK energy campaigner Louise Hutchins said: “The pledge to end dirty coal that David Cameron seems to have casually dropped from his summit speech wasn’t just a footnote but the keystone of any serious policy to clean up Britain’s energy system.
(19) Also speaking at the fossil fuel conference in Houston, ExxonMobil chairman and chief executive Rex Tillerson called for the exploitation of Arctic oil and gas reserves and the building of the Keystone XL pipeline to bring oil from Canada’s tar sands to the US.
(20) This is absolutely not in our national interest.” The campaign against Keystone XL has become a national movement over the last three years, with environmental activists, Nebraska landowners and hedge fund managers all coming out against the project.