Thalassometer definitions

Thalassometer

1) Tide register
Found on https://www.crosswordclues.com/clue/thalassometer

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thalassometer

instrument for measuring tides
Found on http://phrontistery.info/t.html

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thalassometer

thalassometer A tide gauge; measuring the tides.
Found on http://www.wordinfo.info/words/index/info/view_unit/1302/40

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