limnographn.
/ˈlɪmnəɡrɑːf//ˈlɪmnəɡraf/ An apparatus for automatically recording the variations of level in a lake.
ΚΠ
1880 Nature 4 Mar. 427 Beside the fixed limnograph of M. Plantamour.
This entry has not yet been fully updated (first published 1903; most recently modified version published online March 2018).
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n.1880