Sigmoid valves
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]


The Collaborative International Dictionary of English. 2000.

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  • Sigmoid valves — 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… …   The Collaborative International Dictionary of English

  • 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… …   The Collaborative International Dictionary of English

  • Sigmoid flexure — 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… …   The Collaborative International Dictionary of English

  • Sigmoid colon — Front of abdomen, showing surface markings for liver, stomach, and great intestine. Latin colon sigmoideum Gray s …   Wikipedia

  • Semilunar valves — 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… …   The Collaborative International Dictionary of English

  • Sigmoidal — 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… …   The Collaborative International Dictionary of English

  • 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… …   The Collaborative International Dictionary of English

  • Semilunar bone — 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… …   The Collaborative International Dictionary of English

  • Vein — A blood vessel that carries blood low in oxygen content from the body back to the heart. The deoxygenated form of hemoglobin (deoxyhemoglobin) in venous blood makes it appear dark. Veins are part of the afferent wing of the circulatory system… …   Medical dictionary

  • digestive system, human — Introduction  the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract (alimentary canal), or the series of structures and organs through which food and liquids pass… …   Universalium

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