Definition

A unit of energy that is equal to 1,000 joules, commonly used to measure energy in food and nutrition.

Example

The chocolate bar contains 1,200 kilojoules of energy.

Conversation

Have you ever heard of a kilojoule?

Yeah, I think it's a unit of energy, right?

Exactly! It's used to measure the energy in food.

That's cool, I should pay more attention to kilojoules when I read labels.

Synonyms & Antonyms

Root Explanation

Kilojoule is formed from "kilo-" (from Greek "chilioi", meaning a thousand) and "joule" (named after the English physicist James Prescott Joule, representing a unit of energy). The word "kilojoule" refers to a unit of energy equal to one thousand joules.

Memory Tip

Think of 'kilo-' meaning a thousand, and 'joule' as a unit of energy. This helps you remember that a kilojoule is a measure of energy that equals one thousand joules.

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