sigmoid

[ sig-moid ]

adjective

1. shaped like the letter C.
2. shaped like the letter S.
3. of, relating to, or situated near the sigmoid flexure of the large intestine.

sigmoid

/ ˈsɪɡmɔɪd /

adjective

1. shaped like the letter S
2. of or relating to the sigmoid colon of the large intestine

noun

1. See sigmoid colon
   See sigmoid colon

Other Words From

• sig·moidal·ly adverb
• post·sigmoid adjective
• postsig·moidal adjective

Word History and Origins

Origin of sigmoid¹

First recorded in 1660–70, sigmoid is from the Greek word sigmoeidḗs shaped like a sigma. See sigma, -oid

Word History and Origins

Origin of sigmoid¹

C17: from Greek sigmoeidēs sigma-shaped

Example Sentences

Valve lanceolate, sigmoid; axial area very narrow, central area small; stri punctate, in transverse and oblique lines.

From Project Gutenberg

Valve linear-lanceolate with produced rostrate apices, asymmetrical, sigmoid; pseudoraphe narrow; pseudo-nodule large.

From Project Gutenberg

Valve lanceolate, sigmoid; axial area very narrow, central area small; stri punctate, in transverse and longitudinal rows.

From Project Gutenberg

The raphe confined within a sigmoid keel or extension of the valve; the central and terminal nodules indistinct.

From Project Gutenberg

Valve linear, slightly sigmoid, tapering to the sub-capitate ends; keel puncta, 11 in 10 ; stri subtle.

From Project Gutenberg

Related Words

• arched
• crooked
• curvaceous
• elliptical
• rounded
• serpentine
• twisted
• twisting