sigˈmate /-māt/ adjective

Shaped like Σ, C, or S

To add σ or ς to

sigmatic /-matˈik/ adjective

Characterized by σ

sigmāˈtion /-shən/ noun

The adding of σ or ς at the end of a syllable

sigˈmatism noun

Repetition of the s-sound

sigˈmatron noun

A machine consisting of two accelerators (cyclotron and betatron; see under accelerate), for the generation of very high-energy X-rays

sigˈmoid or sigmoidˈal adjective

1. C-shaped
2. S-shaped

sigmoidˈally adverb

sigmoidecˈtomy noun (surgery)

Removal of the sigmoid colon

sigmoidˈoscope noun

An instrument inserted through the anus and used for examining the interior of the rectum and sigmoid colon

sigmoidoscopic /-skopˈik/ adjective

sigmoidosˈcopy noun

sigma particles plural noun (physics)

Three hyperons of medium mass, having respectively positive, neutral and negative charge

sigmoid flexure noun (zoology, etc)

1. A C-shaped or S-shaped bend
2. (also sigmoid colon) the S-shaped terminal part of the descending colon that leads to the rectum