Sigma is the eighteenth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 200. When used at the end of a word (when the word is not all caps), the final form (ς) is used, e.g. Ὀδυσσεύς (Odysseus); note the two sigmas in the center of the name, and the word-final sigma at the end.
The name of sigma, according to one hypothesis, may continue that of Phoenician Samekh. According to a different theory, its original name may have been san (the name today associated with another, obsolete letter), while sigma was a Greek innovation that simply meant "hissing", based on a nominalization of a verb σί
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The Greek alphabet has been used to write the Greek language since the 8th century BC. It was derived from the earlier Phoenician alphabet, and was the first alphabetic script to have distinct letter… read more »
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An alphabet is a standard set of letters (basic written symbols or graphemes) that is used to write one or more languages based on the general principle that the letters represent phonemes (basic sig… read more »