from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A device used to measure tidal levels.
from The Century Dictionary and Cyclopedia
- n. A self-registering instrument for making a continuous record of the height of the tides; a tidegage.
Sorry, no etymologies found.
-- With engravings and diagrams showing the Siemens and Halske marigraph and the operation of the same.
For registering the height of the tide at every instant, hydrographic services generally adopt quite a simple marigraph.