Definition

The 18th letter of the Greek alphabet, often used in mathematics and science to represent various concepts.

Example

In mathematics, sigma is commonly used to denote the summation of a series.

Conversation

Did you know that sigma is the 18th letter of the Greek alphabet?

Really? I had no idea it was that far down the list.

Yeah, and it's also used in science and math a lot.

That's interesting! I wonder how many people actually know about sigma.

Synonyms & Antonyms

Root Explanation

**Sigma** → The word 'sigma' comes from the Greek letter 'Σ' (uppercase) or 'σ' (lowercase), which is the 18th letter of the Greek alphabet. The letter itself does not have a specific meaning beyond its use as a symbol in mathematics and science, often representing summation or standard deviation. Thus, 'sigma' is primarily recognized as a letter with various applications in different fields.

Memory Tip

Think of 'sigma' as a symbol in mathematics, often used to represent summation, which helps you remember its significance in calculations.

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