This is an irregular feature - both in frequency and oddness - dedicated to a word I came across that I have never previously used.
udometer (yoo-DAHM-eh-tehr) n. A device designed capture and record the amount of precipitation; in simpler terms, a rain gauge.
There are modern udometers that record both the level and intensity of rain. The word udometer is derived from the Latin ūdus, meaning ""wet" and the Greek word metron, for "measure." Rain gauges are also called "pluviometers."