[ 'sɪgmɔɪd ]
■ adjective
1》 curved like the uncial sigma (resembling the letter c ); crescent-shaped.
2》 S-shaped.
3》 Anatomy of or denoting the curved part of the colon leading into the rectum.
Derivatives
~al adjective
Origin
C17: from Gk sigmoeidēs , from sigma (see sigma ).