Definition

A medical treatment that uses radiation to kill or shrink cancer cells and other diseases.

Example

The doctor recommended radiotherapy as part of the cancer treatment plan.

Conversation

Have you heard about my friend's treatment plan?

No, what is it?

She’s starting radiotherapy next week.

That sounds intense, but I hope it helps her recover.

Synonyms & Antonyms

Root Explanation

Radiotherapy → It is formed from "radio-" (from Latin "radius", meaning ray) and "therapy" (from Greek "therapeia", meaning treatment). The word refers to treatment using rays, particularly in the context of medical treatment for cancer.

Memory Tip

Think of 'rays' ('radio-') being used for 'treatment' ('therapy') — that's how radiotherapy works.

Visually Confused Words