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sigma |
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sigma 1. the 18th letter in the Greek alphabet (Σ, σ or, when final, ς), a consonant, transliterated as S 2. Maths the symbol Σ, indicating summation of the numbers or quantities indicated sigma [′sig·mə] (invertebrate zoology) A C-shaped spicule.
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sigma-delta analog-to-digital converter sigma-delta converter sigma-delta digital-to-analog converter sigma-delta modulator sigma-minus hyperonic atom sigma-T sigmaspire sigmate sigmatron sigmatropic shift sigmoid sigmoid colon sigmoid distortion sigmoidal dune sigmoidal fold |
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