altitude

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altitude

[al′tito̅o̅d]
Etymology: L, altitudo, height
the level of elevation of any location on earth with reference to a fixed surface point, which is usually sea level. Several types of health effects are associated with altitude extremes, including a greater intensity of ultraviolet radiation that results from a thinner atmosphere. Barometric pressure decreases as altitude increases, so there are fewer molecules of oxygen. Thus breathing becomes faster & deeper, although demands of physical effort and cellular respiration are the same as at a lower altitude. High-altitude cardiac intolerance is usually worse in people with blood or pulmonary disorders. See also altitude sickness.
References in periodicals archive ?
The plane continued to climb to its cruising altitude and finally levelled at 34,000 feet.
After a surprisingly sharp take-off in December, average price inflation for shipping freight on scheduled flights leveled off at a more comfortable cruising altitude in January.
Bob McEwan, from the Ridgeway Veterinary Group, said: "I have screwed a few carpal knee fractures, the last of them Cruising Altitude, who, unfortunately, had to be put down, but nowadays such injuries are treated conservatively, which is six to nine months' box rest.
Air travel regulations meant that passengers couldn't slip out of their clothes until the jet was at cruising altitude.
At a cruising altitude, today's airplane cabins are pressurized to simulate an altitude of 5,000-8,000 feet, which healthy babies tolerate well.
Once the jet reaches its cruising altitude, the passengers will be invited to disrobe.
Once the aircraft reaches cruising altitude, you will be free to enjoy the flight clothes-free," says Castaways Travel, a Houston-area travel agency that specialises in "clothing-optional trips".
It's a good idea to give older children a sweet to suck, and give younger children a bottle or even breast feed as the plane goes up to its cruising altitude.
In the case of some business jets, the winglets can help the aircraft reach maximum cruising altitude without having to do what's called step climb, which burns fuel, according to Bento Silva de Mattos, a senior engineer at Embraer.
Radar provided by China's civil aviation authorities indicated that flight CI611 was still on its ascent to its cruising altitude less than half an hour into its flight from Taipei to Hong Kong when it suddenly lost altitude and speed before pulling up again and suddenly disappearing from the screen.
On a Continental flight: Ladies, and gentlemen, we've reached cruising altitude and will be turning down the cabin lights.