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| air pocket |
a downward air current that can cause an abrupt change, usu. a drop, in an aircraft's altitude. |
| alt.2 |
abbreviation of "altitude," the height of a given object or location above a specified base, such as sea level or earth, esp. the angular distance of a celestial body, measured from the horizon. |
| altazimuth |
a telescope or other instrument that moves in altitude (up and down) and in azimuth (back and forth). |
| altimeter |
an altitude-measuring device such as a specially calibrated barometer. |
| automatic pilot |
an instrument that automatically keeps an aircraft, missile, or the like on a predetermined course at a specific altitude. [1/2 definitions] |
| cirrocumulus |
a high-altitude cloud formed of many small, thin, rounded cloudlets, often arranged in rows or regular series. |
| cirrostratus |
a thin, hazy, high-altitude cloud, which usu. covers the entire sky. |
| cirrus |
a high-altitude cloud usu. appearing in the form of filaments or threads. [1/3 definitions] |
| height |
vertical extent or altitude; distance up. [1/5 definitions] |
| high-level |
at, or done at, a high altitude. [1/2 definitions] |
| pull up |
to increase the altitude of an airplane or other aircraft. [1/6 definitions] |
| quadrant |
an apparatus formerly used to measure the altitude of celestial objects, esp. for navigation. [1/5 definitions] |
| Roche limit |
the lowest altitude at which a natural satellite can form and orbit a planet or the like without being disturbed by gravitational forces. |
| sideslip |
of an airplane, to fly sideways and downwards, either intentionally or as a result of banking too steeply, or to move laterally without losing altitude, as when caught in a crosswind. [1/3 definitions] |
| stratocumulus |
a low-altitude cloud type characterized by large dark horizontal masses with rounded summits. |
| stratopause |
the zone between the mesosphere and stratosphere wherein temperatures drop as altitude increases, about thirty-one to thirty-five miles above the earth. |
| suborbital |
of a rocket or other spacecraft, not reaching a high enough altitude or speed to complete one full orbit around the earth. [1/2 definitions] |
| thermosphere |
the extreme outer edge of the earth's atmosphere, within which temperature increases steadily with altitude. |
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