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noun, Physics.
an unstable hyperon having positive, negative, or zero electric charge and strangeness −1. Symbol: Σ.


Read Also:

  • Sigmate

    adjective 1. having the form of the Greek sigma or the letter S. adjective 1. shaped like the Greek letter sigma or the Roman S

  • Sigmatism

    noun 1. defective pronunciation of sibilant sounds.

  • Sigmoid

    adjective 1. shaped like the letter C. 2. shaped like the letter S. 3. of, relating to, or situated near the sigmoid flexure of the large intestine. adjective 1. shaped like the letter S 2. of or relating to the sigmoid colon of the large intestine noun 3. See sigmoid colon sigmoid sig·moid (sĭg’moid’) or […]

  • Sieg-heil

    interjection, German. 1. hail to victory: a salute used by the Nazis. uknown 1. hail to victory: a Nazi salute, often accompanied by the raising of the right arm

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