[al-tim-i-ter, al-tuh-mee-ter] 
| 1. | a sensitive aneroid barometer that is graduated and calibrated, used chiefly in aircraft for finding distance above sea level, terrain, or some other reference point by a comparison of air pressures. |
| 2. | any device used for the same purpose that operates by some other means, as by radio waves. |
| al·tim·e·ter (āl-tĭm'ĭ-tər) n. An instrument for determining elevation, especially an aneroid barometer used in aircraft that senses pressure changes accompanying changes in altitude. [Latin altus, high; see al-2 in Indo-European roots + -meter.] al'ti·met'ric (āl'tə-mět'rĭk) adj., al·tim'e·try n. |
| altimeter (āl-tĭm'ĭ-tər) Pronunciation Key
An instrument that measures and indicates the height above sea level at which an object, such as an airplane, is located. |
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