1. 测高学：hypsicephaly 尖头畸形 | hypsography 测高学 | hypsometer 测高计
2. 地形测绘学;等高线法：hypsographic curve 等高线 | hypsography 地形测绘学;等高线法 | hypsometer 沸点测高器
3. 测高术：hypsographicnames 地形图名称 | hypsography 测高术 | hypsometricmap 地形图
4. 高度型：hypoxid layer 缺氧層 | hypsography 高度型 | hypsometer 沸點測高計
noun
1. measurement of the elevation of land above sea level
Synonym: hypsometry
2. the scientific study of the earth's configuration above sea level (emphasizing the measurement of land altitudes relative to sea level)