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σ (EN)
letter, symbol

letter “σ”

σ, sigma
  1. den uechtzéngte Buschtaf vum griicheschen Alphabet, kleng Sigma
    In Greek language classes, students learn that σ is the lowercase form of sigma.

symbol “σ”

σ
  1. (mathematik) e Symbol dat d'standard Ofwäichung an der Statistik duerstellt
    The statistician calculated σ to understand how the data varied from the mean.
  2. (Physik) e Symbol dat d'elektresch Leetfäegkeet duerstellt
    The electrical conductivity σ increases with temperature in this material.
  3. (Physik) e Symbol dat d'Querschnittsfläch representéiert
    The scattering cross-section σ is crucial in nuclear physics experiments.