| hydroisohypse | (noun) a line on a map connecting points of equal level on the piezometric surface. | - |
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| hypsography | (noun) measurement of the elevation of land above sea level | Synonyms: hypsometry |
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| (noun) the scientific study of the earth's configuration above sea level (emphasizing the measurement of land altitudes relative to sea level) | - |
| hypsometer | (noun) an altimeter that uses the boiling point of water to determine land elevation | - |
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| hypsometry | (noun) measurement of the elevation of land above sea level | Synonyms: hypsography |
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