Definition

A device used to measure the average rate of radioactive emissions or the counting rate of an electronic counter over a specific time period.

Example

The scientist used a ratemeter to monitor the radiation levels in the laboratory.

Conversation

Have you ever used a ratemeter for your experiments?

No, I haven't. What does it do?

It measures the rate of radioactive emissions over time.

That sounds really interesting! I should look into getting one.

Synonyms & Antonyms

Root Explanation

Ratemeter → It is formed from "rate" (from Latin *ratem*, meaning a measure or standard) and "meter" (from Greek *metron*, meaning measure). The word "ratemeter" refers to an instrument that measures a rate, such as speed or flow.

Memory Tip

Think of 'rate' as a standard measure and 'meter' as a tool for measuring — together, they describe a device that measures rates.

Visually Confused Words