English
ratemeter
From rate + -meter.
A compound of rate + -meter
Proto-Indo-European *h₂reh₁- ‘to think’
…
Latin prō ratā parte ‘according to a fixed part’
Medieval Latin rata
Old French rate
Middle English rate
English rate
Today it means
noun Any of several devices that measure the average rate of radioactive emissions over a specified time interval.
Sources
Sources: Wiktionary, “ratemeter”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / ratemeter