Definition

A device or element that responds to a stimulus or introduces reactance in a circuit, often used in electronics and physics, such as a nuclear reactor.

Example

The nuclear reactor generates electricity by harnessing the energy released from nuclear reactions.

Conversation

Did you hear about the new nuclear reactor they're building nearby?

Yeah, I read that it could provide a lot of energy for the city.

I'm a bit concerned about safety, though; what if something goes wrong with the reactor?

I think they have really strict regulations in place to prevent any issues.

Synonyms & Antonyms

Root Explanation

Reactor → It is formed from "re-" (meaning again) and "agere" (meaning to do or act). The word "reactor" refers to something that acts again or responds to a stimulus, particularly in the context of nuclear reactions.

Memory Tip

Think of something that 'acts again' in response to a change — 're-' means again, and 'agere' means to act.

Visually Confused Words