HyperDic: sigma

English > 1 sense of the word *sigma*:
NOUN	communication	sigma	the 18th letter of the Greek alphabet

sigma > pronunciation
Sounds	sih'gmah
Rhymes	Alabama ... Yuma: 82 rhymes with mah...

English > *sigma*: 1 sense > noun 1, communication
Meaning	The 18th letter of the Greek alphabet.
Member of	Greek alphabet	The alphabet used by ancient Greeks
Broader	letter, letter of the alphabet, alphabetic character	The conventional characters of the alphabet used to represent speech
Spanish	sigma
Catalan	sigma