English dictionary
cathetometer
/,k/&//T//I/'t/A/m/I/t/@/r/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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An instrument for the accurate measurement of small differences of height; esp. of the differences in the height of the upper surfaces of two columns of mercury or other fluid, or of the same column at different times. It consists of a telescopic leveling apparatus <i>(d)</i>, which slides up or down a perpendicular metallic standard very finely graduated (<i>bb</i>). The telescope is raised or depressed in order to sight the objects or surfaces, and the differences in vertical height are thus shown on the graduated standard.
Source: webster1913