sigma

[ sig-muh ]
/ ˈsɪg mə /

noun

the 18th letter of the Greek alphabet: Σ, σ, ς.
the consonant sound represented by this letter.

Origin of sigma

1600–10; < Latin < Greek sígma

Example sentences from the Web for sigma

British Dictionary definitions for sigma

sigma
/ (ˈsɪɡmə) /

noun

the 18th letter in the Greek alphabet (Σ, σ, or, when final, ς), a consonant, transliterated as S
maths the symbol Σ, indicating summation of the numbers or quantities indicated

Word Origin for sigma

Greek, of Semitic origin; related to Hebrew samekh

Medical definitions for sigma

sigma
[ sĭgmə ]

n.

The 18th letter of the Greek alphabet.

Scientific definitions for sigma

sigma
[ sĭgmə ]

A sigma baryon.