'Sigmoidal' definitions:
Definition of 'sigmoidal'
From: WordNet
adjective
Of or relating to the sigmoid flexure in the large intestine [syn: sigmoid, sigmoidal]
Definition of 'Sigmoidal'
From: GCIDE
- Sigmoid \Sig"moid\, Sigmoidal \Sig*moid"al\, a. [Gr. ???; ??? sigma + e'i^dos form, likeness: cf. F. sigmo["i]de.] Curved in two directions, like the letter S, or the Greek [sigmat]. [1913 Webster]
- Sigmoid flexure (Anat.), the last curve of the colon before it terminates in the rectum. See Illust. under Digestive.
- Sigmoid valves. (Anat.) See Semilunar valves, under Semilunar. [1913 Webster]