al·tim·e·ter
noun/ˈæltɪmiːtə(r)/
/ælˈtɪmətər/
- 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 Word Originearly 20th cent.: from Latin altus ‘high’ + -meter (see meter).