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altimeter

noun
🔊/ˈæltɪmiːtə(r)/
🔊/ælˈtɪmətər/
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  1. an instrument for showing height above sea level, used especially in an aircraft（尤指用于航空器中的）测高仪，高度表Topics Transport by airc2
    Word Originearly 20th cent.: from Latin altus ‘high’ + -meter (see meter).