(n.) A small circle of the sphere parallel to the horizon; a circle or parallel of altitude. Two stars which have the same almucantar have the same altitude. See Almacantar.
Example Sentences:
Altitude
Definition:
(n.) Space extended upward; height; the perpendicular elevation of an object above its foundation, above the ground, or above a given level, or of one object above another; as, the altitude of a mountain, or of a bird above the top of a tree.
(n.) The elevation of a point, or star, or other celestial object, above the horizon, measured by the arc of a vertical circle intercepted between such point and the horizon. It is either true or apparent; true when measured from the rational or real horizon, apparent when from the sensible or apparent horizon.
(n.) The perpendicular distance from the base of a figure to the summit, or to the side parallel to the base; as, the altitude of a triangle, pyramid, parallelogram, frustum, etc.
(n.) Height of degree; highest point or degree.
(n.) Height of rank or excellence; superiority.
(n.) Elevation of spirits; heroics; haughty airs.
Example Sentences:
(1) The development of pulmonary edema in high-altitude residents with upper respiratory infections and no antecedent low-altitude journey is consistent with the presence of other factors such as inflammation, which may play a role in the pathogenesis of the edema.
(2) It is shown that the combined effects of altitude and wind assistance yielded an increment in the length of the jump of about 31 cm, compared to a corresponding jump at sea level under still air conditions.
(3) Eight men and eight women each performed peak oxygen intake tests on a cycle ergometer breathing ambient air and a mixture of 12% oxygen in nitrogen (equivalent to an altitude of 4400 m) in the two experiments.
(4) Treatment and prevention of menstrual disorders of women at high altitudes could be carried out by invigorating Qi, regulating blood, promoting the flow of Qi, by warming the channel and regulating Zang and Fu, etc.
(5) Therefore, the hypothesis of a fetal sensori-neural hearing loss due to oxygen lack was tested in the following animal models: a) Adult cats to which feline red blood cells were infused thus causing a polycythemia similar to fetal conditions; b) Adult rats acclimated to altitude in a hypobaric chamber, inducing erythropoiesis with elevated hematocrit and hemoglobin; c) Neonatal guinea pigs and goats studied when they were less than 12 hours old so that the fetal compensatory mechanisms were still present.
(6) Previously, we found resting metabolic rate increased at high altitude but the mechanism and consequences of this increase were unclear.
(7) These data suggest that the positive relationship between pelleted feeds and incidence of ascites observed at high altitudes also exists at lower elevations.
(8) The dogs were housed in gravel-based, outdoor pens with doghouses in a high-altitude, high-sunshine level environment.
(9) Cabin altitudes ranged from sea level to 8,915 feet (2717 m).
(10) Rats were exposed to crhonic hypobaric hypoxia at a simulated altitude of 4250 m for 3, 6, 9, 12, 20, and 35 days.
(11) These data indicate that, compared with animals at sea level, animals at altitude have an increased body burden of COHb and will attain the COHb level associated with the National Ambient Air Quality Standard for CO more quickly when breathing CO.
(12) During rest at high altitude, a 32% decrease in coronary blood flow was largely offset by a 28% increase in coronary arterial O2 extraction to maintain myocardial O2 delivery.
(13) The importance of including highaltitude pulmonary edema in the differential diagnosis of any patient who is admitted with coma after a sojourn at high altitude is stressed.
(14) At altitude, temazepam led to less wakefulness and to drowsy sleep--there were no prolonged sleep latencies.
(15) We investigated acute and chronic hypoxic pulmonary pressor responses in two groups of calves, one bred to be susceptible, the other resistant to high-altitude pulmonary hypertension.
(16) The following species features of this animals are associated with their adaptation to high-altitude hypoxia: organization of alpha-granules, mitochondria, the contractile system (microtubes, F-actin), ovoid form of platelets.
(17) Therefore, myocardial hypoxia is not the basis for the decrease in cardiac stroke volume at high altitude reported previously and also observed in the present study.
(18) Thus, the amount of lung vascular smooth muscle inherent within each species is a major determinant of the pulmonary hypertensive response to high altitude and contributes to the interspecies variability in this response.
(19) The turnover time of NE in the hypothalamus remained unchanged, regardless of the altitude, while in the rest of the brain the rate constant of neurotransmitter elimination decreased inversely as a linear function of the degree of hypoxia.
(20) Rats trained to the high-altitude hypoxia displayed signs of intensification of both the plastic and lytic processes; one of these processes prevailed in different cells.