SIGMOID

sigmoid, sigmoidal

(adjective) of or relating to the sigmoid flexure in the large intestine

sigmoid

(adjective) curved in two directions (like the letter S)

Source: WordNet® 3.1

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Etymology

Adjective

sigmoid (not comparable)

(geometry) Curved in two directions, like the letter "S", or the Greek ς (sigma).

Having a serpentine shape; resembling S or ʃ

(mathematics) Exhibiting logistic growth; having a graph that accelerates until it reaches a carrying capacity

(geometry, archaic) Semi-circular, like the lunar sigma (similar to English C).

(anatomy) Relating to the sigmoid flexure of the large intestine.

Synonyms

• sigmoidal

• (curing in two directions) S-shaped (informal)

Noun

sigmoid (plural sigmoids)

(mathematics) A function having a graph whose shape is sigmoid..

Source: Wiktionary

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Sig"moid, Sig*moid"al, a. Etym: [Gr. sigmoïde.]

Definition: Curved in two directions, like the letter S, or the Greek s. 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.

Source: Webster’s Unabridged Dictionary 1913 Edition

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