SIGMA


Meaning of SIGMA in English

[ 'sɪgmə ]

■ noun

1》 the eighteenth letter of the Greek alphabet ( Σ , σ , or at the end of a word ς ), transliterated as ‘s’.

2》 [as modifier ] Chemistry & Physics (of an electron or orbital) with zero angular momentum about an internuclear axis.

■ symbol

1》 ( Σ ) mathematical sum.

2》 ( σ ) standard deviation.

Origin

from Gk.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.