sigmoid adj

1 curved in two directions (like the letter S)

2 of or relating to the sigmoid flexure in the large intestine [syn: sigmoidal]

English

Etymology

From (sigmoeidēs) < or (sigma) "sigma" + (eidos) "form, likeness". Compare with French sigmoïde.

Pronunciation

• /ˈsɪg.mɔɪd/

Adjective

1. Curved in two directions, like the letter "S", or the Greek ς (sigma).
2. In the context of "geometry|archaic": Semi-circular, like the lunar sigma (similar to English C).
3. Relating to the sigmoid flexure of the large intestine.

Synonyms

• sigmoidal

Derived terms

• sigmoid artery
• sigmoid colon
• sigmoid flexure
• sigmoid fossa
• sigmoid groove
• sigmoid sinus
• sigmoid valve
• sigmoid function
• sigmoidoscope

Noun

1. A function having a graph whose shape is sigmoid. See Wikipedia, Mathworld.

Sigmoid means resembling the lower-case Greek letter sigma (ς). Specific uses include:

• Sigmoid function, a mathematical function
• Sigmoid colon, part of the large intestine or colon.

Cynthian, S-shaped, ambagious, anfractuous, bicorn, circuitous, circumlocutory, convolutional, corniform, crescent, crescent-shaped, crescentic, crescentiform, crescentlike, falcate, falciform, flexuose, flexuous, horn-shaped, horned, involute, involuted, involutional, labyrinthine, lunar, lunate, luniform, lunular, mazy, meandering, meandrous, menisciform, meniscoid, moon-shaped, moonlike, rivose, rivulose, roundabout, ruffled, semicircular, semilunar, serpentine, sickle-like, sickle-shaped, sinuate, sinuose, sinuous, snaky, torsional, tortile, tortuous, turning, twisting, twisty, two-horned, whorled, winding, wreathlike, wreathy