Main Entry: sig·moid

Pronunciation: \ˈsig-ˌmȯid\

Variant(s): also sig·moi·dal \sig-ˈmȯi-d^əl\

Function: adjective

Etymology: Greek sigmoeidēs, from sigma; from a common form of sigma shaped like the Roman letter C

Date: 1670

1 a : curved like the letter C b : curved in two directions like the letter S
2 : of, relating to, or being the sigmoid colon

— sig·moi·dal·ly \sig-ˈmȯi-d^əl-ē\ adverb