Definition

A measurement of heat energy that is equal to 1,000 large calories or 100,000 British thermal units.

Example

The heating system uses a therm to measure the amount of heat produced.

Conversation

Did you know that a therm is a unit of heat?

Really? I had no idea what it measured.

Yeah, it's equal to 100,000 British thermal units.

That's interesting! I wonder how that compares to other units.

Synonyms & Antonyms

Root Explanation

Therm is derived from the Greek word "thermos" (meaning hot or warm). It is often used as a prefix in English to denote heat or temperature-related concepts.

Memory Tip

Think of the Greek word for hot, 'thermos', to remember that 'therm' relates to heat or warmth.

Visually Confused Words