Bathometer

A bathometer (also bathymeter) is an instrument for measuring water depth. It was previously used mainly in oceanographical studies, but is rarely employed nowadays. The term originates from Greek βαθύς (bathys), «deep» and μέτρον (metron), «measure». == Sources== ...
Found on http://en.wikipedia.org/wiki/Bathometer

Bathometer

Ba·thom'e·ter noun [ Greek ba`qos depth + -meter .] An instrument for measuring depths, esp. one for taking soundings without a sounding line.
Found on http://www.encyclo.co.uk/webster/B/21

Bathometer

• (n.) An instrument for measuring depths, esp. one for taking soundings without a sounding line.
Found on http://thinkexist.com/dictionary/meaning/bathometer/

bathometer

bathometer 1. An instrument for measuring the depth of a body of water. 2. A device for ascertaining the depth of water; a bathymeter. 3. An instrument that is used to measure water depth without the use of a sounding line. The bathometer does not require a line to extend to the bottom because it measures the difference in the gravitational effe
Found on http://www.wordinfo.info/words/index/info/view_unit/287/

Bathometer

A bathometer is an apparatus invented by William Siemens in 1861 to measure the depth of water without submerging a sounding line. Its action depends on the diminution of the effect of gravitation on the surface of the water as compared with its effect on the earth, owing to the mass of water (of less density) which replaces earth (of greater densi
Found on http://www.probertencyclopaedia.com/browse/GB.HTM
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