西格玛

Traditional form:

西格瑪

Pinyin (reading):

xīgémǎ

Definitions:

• sigma (Greek letter Σσ)
• (symbol for standard deviation in statistics)

Characters:

• 西 - west, western, westward
• 格 - form, pattern, standard
• 玛 - agate, cornelian

Traditional characters:

• 西 - west, western, westward
• 格 - form, pattern, standard
• 瑪 - agate, cornelian