The Collaborative International Dictionary
Pluviograph
Pluviograph \Plu"vi*o*graph\, n. [L. pluvia rain + -graph.] A self-registering rain gauge.
Wiktionary
pluviograph
n. An instrument for measuring the amount of water that has fallen (i.e. a rain gauge), with a feature to register the data in real time to demonstrate rainfall over a short period, often an automated graphing instrument.
Usage examples of "pluviograph".
An instrument enclosure, full of pluviographs and anonometers and celometers and a score of other gadgets, lay between the admin building and the cabins.