Udometer n. : A rain gauge.

Example:
A Udometer is a gauge for measuring what?

Taxonomy
rain gauge, gauges, bucket rain gauge, bucket, precipitation, funnel, rain, cylinder, recorder, container, measure precipitation, free encyclopedia, Search, precipitation gauge, 25 mm, graduated cylinder, pen, collector.

Defination from the web:
Udometer) Jump to: navigation, search. Standard Rain Gauge. Tipping Bucket Rain Gauge Recorder ... A rain gauge (also known as a udometer or a pluviometer [Pluviograph ] or a cup) is a type of instrument used by ...