'Sigmoid valves' definitions:
Definition of 'Sigmoid valves'
From: GCIDE
- Semilunar \Sem`i*lu"nar\, a. Shaped like a half moon. [1913 Webster]
- Semilunar bone (Anat.), a bone of the carpus; the lunar. See Lunar, n.
- Semilunar valves, or Sigmoid valves (Anat.), the valves at the beginning of the aorta and of the pulmonary artery which prevent the blood from flowing back into the ventricle. [1913 Webster]
Definition of 'Sigmoid valves'
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]