cathetometer
noun
cath·e·tom·e·ter
ˌkathəˈtämətə(r)
plural -s
: an instrument for accurate measurement of small differences in height (as of columns of mercury or other fluids) consisting of a telescopic leveling apparatus that slides up or down a perpendicular standard with a finely graduated scale
cathetometric adjective
¦kathətə¦me‧trik
Word History
Etymology
International Scientific Vocabulary catheto- (from Greek kathetos vertical height, perpendicular line, from kathetos let down, from kathienai) + -meter
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