bathometern.
/bəˈθɒmɪtə/ A spring balance of peculiar construction for ascertaining the depth of water without actually measuring the sounding line.
ΚΠ
1875 J. Prestwich in Philos. Trans. (Royal Soc.) 165 616 Obtained, by means of his bathometer..the low readings given.
This entry has not yet been fully updated (first published 1885; most recently modified version published online March 2018).
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n.1875