Sigma

usgb/ˈsɪɡmə/
noun

The 18th letter of the Greek alphabet.

The Greek word for seven starts with the letter sigma.
Visual representation of "sigma" - The 18th letter of the Greek alphabet

Often appears as...

  • greek alphabet
  • lowercase sigma
Definition 1 of 4
Visual representation of "sigma"
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Language Origin

Sigma originates from Greek. Understanding Greek letters is helpful when encountering academic or scientific terms.

Illustration for Language Origin
The symbol σ (sigma) is often used in scientific notation.
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Visual Similarity

Lowercase sigma has two forms; one used in the middle of words (σ), and another as the final letter (ς).

Illustration for Visual Similarity
The sigma at the end of 'basilicas' changes to ς.
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Pronunciation

Sigma is pronounced as 'sig-muh'. It can help to link it with the sound in 'signal'.

Illustration for Pronunciation
Remember to pronounce the 'g' in sigma softly, like in 'signal'.
Visual representation of the word "Sigma"

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