sigma
From Wiktionary, the free dictionary
From Wiktionary, the free dictionary
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Wikipedia article on sigma |
From Ancient Greek σῖγμα (sîgma), σίγμα (sígma), probably from the root sig- as seen in σίζω (sízō) (< sig-yo "to hiss") + -μα (-ma). [1][2]
sigma (plural sigmas or sigmata)
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