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sigma
nounmasculinetechnicalcommon/ˈsiɡmɐ/sig·ma
Definition
1The name of the eighteenth letter of the Greek alphabet (Σ, σ, ς). In statistics, the symbol for standard deviation. In linguistics, the symbol for syllable.
Usage examples
“The sigma symbol (Σ) is used in mathematics to represent summation.”
“The lowercase form of Greek sigma is σ in word-internal/middle position and ς at the end of a word.”
Common combinations
sigma letterlowercase sigma (σ)uppercase sigma (Σ)final sigma (ς)