from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Having the shape of the letter S.
- adj. Of or relating to the sigmoid colon.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Curved in two directions, like the letter "S", or the Greek ς (sigma).
- adj. Semi-circular, like the lunar sigma (similar to English C).
- adj. Relating to the sigmoid flexure of the large intestine.
from the GNU version of the Collaborative International Dictionary of English
- adj. Curved in two directions, like the letter S, or the Greek ς.
from The Century Dictionary and Cyclopedia
- Shaped like the Greek capital letter sigma in either of its forms. (See sigma, 1.)
- Specifically— Of the colon, at the end of the descending colon, terminating ill the rectum.
- Of the spinal column of man and a few of the highest apes, highly characteristic of the erect attitude. It does not exist in the infant.
- Of the cervical vertebral of birds and some reptiles, as cryptodirous turtles, when the head is drawn in straight upon the shoulders. It disappears when the head is thrust forward and the neck thus straightened out. It is very strongly marked in long-necked buds, as herons.
- Synonyms See semilunar.
- n. A sigmoid curve.
- n. The region of the sigmoid flexure of the colon.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. of or relating to the sigmoid flexure in the large intestine
- adj. curved in two directions (like the letter S)
Greek sīgmoeidēs : sīgma, sigma; see sigma + -oeidēs, -oid.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek σιγμοειδής (sigmoeidēs), from σίγμα (sigma) or σῖγμα (sigma, "sigma") + εἶδος (eidos, "form, likeness"). Compare with French sigmoïde. (Wiktionary)