Cathetometer

A cathetometer is an instrument for measuring vertical distances in cases where a scale cannot be placed very close to the points whose distance apart is desired. The instrument consists essentially of an accurately graduated scale and a horizontal telescope capable of being moved up and down a rigid vertical column. The position of the telescope ...
Found on http://en.wikipedia.org/wiki/Cathetometer

Cathetometer

• (n.) 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 (d), which slides up or down a perpendicular metallic standard very fine...
Found on http://thinkexist.com/dictionary/meaning/cathetometer/

Cathetometer

Cath`e·tom'e·ter noun [ From Greek ... vertical height + -meter .] 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 ...
Found on http://www.encyclo.co.uk/webster/C/37

Cathetometer

A cathetometer is a device for measuring small vertical differences in height. It consists of a horizontal telescope mounted to slide upon an accurately graduated vertical stand. The observer sights in succession the points under examination and then reads from the scale the distance through which the telescope has moved in making the observations....
Found on http://www.probertencyclopaedia.com/browse/GC.HTM

cathetometer

instrument for measuring short vertical distances
Found on http://phrontistery.info/c.html
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