| plicae iridis | Numerous very fine, almost microscopic, radial folds on the posterior surface of the iris that extend around the pupillary margin. Synonym: plicae iridis. (05 Mar 2000) |
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| plicae palmatae | The two longitudinal ridges, anterior and posterior, in the mucous membrane lining the cervix uteri, from which numerous secondary folds, or rugae, branch off. Synonym: plicae palmatae, arbor vitae uteri, lyra uterina. (05 Mar 2000) |
| plicae recti | The three or four crescentic folds placed horizontally in the rectal mucous membrane; the superior rectal fold is situated near the beginning of the rectum on the left side; the middle rectal fold (Nelaton's fold) is most prominent and consistent and projects from the right side about 8 cm above the anus (approximately the level of the floor of the rectouterine or rectovesical pouch); the inferior rectal fold is on the left side about 5 cm above the anus. Synonym: plicae transversales recti, Houston's folds, Houston's valves, Kohlrausch's valves, plicae recti, rectal folds, rectal valves. (05 Mar 2000) |
| plicae transversales recti | The three or four crescentic folds placed horizontally in the rectal mucous membrane; the superior rectal fold is situated near the beginning of the rectum on the left side; the middle rectal fold (Nelaton's fold) is most prominent and consistent and projects from the right side about 8 cm above the anus (approximately the level of the floor of the rectouterine or rectovesical pouch); the inferior rectal fold is on the left side about 5 cm above the anus. Synonym: plicae transversales recti, Houston's folds, Houston's valves, Kohlrausch's valves, plicae recti, rectal folds, rectal valves. (05 Mar 2000) |
| plicae tubariae tubae uterinae | Many longitudinal folds in the mucous membrane of the uterine (fallopian) tube. Synonym: plicae tubariae tubae uterinae. (05 Mar 2000) |
| plicae tunicae mucosae vesicae felleae | The interlacing folds of the mucosa that produce a honeycomb appearance in the interior of the gallbladder. Synonym: plicae tunicae mucosae vesicae felleae. (05 Mar 2000) |