The sigmoid colon is the last section of the bowel — the part that attaches to the rectum. It pushes feces along the bowel tract. It’s about a foot and a half long (around 40 centimeters) and is ...

A sigmoid septum occurs when part of the heart muscle expands and blocks a pathway blood uses to leave the heart’s left side. It often does not cause symptoms and has links to aging. The heart ...

For a 1963 example of how a sigmoid function and curve can be used, see Reference 1. An electro-optical instrument measures the capacity of red blood cell membranes as their internal pressure ...