What does plicae mean?
Plicae are anatomical folds, especially the numerous transverse and circular folds that line the small intestine. Although they resemble simple ridges, their uneven shape greatly increases the organ's internal surface area, allowing more efficient digestion and nutrient absorption. In these contexts, plicae is normally plural, and related names such as plicae circulares identify particular arrangements or types of folds. The word can also refer to the plural of plica, a comma-shaped mark used above, below, or within letters in some writing systems. The distinction is primarily one of context rather than meaning: in anatomical descriptions the plural emphasizes tissue formations, whereas in linguistics it denotes multiple written or printed marks. Plicae belongs to the learned vocabulary of anatomy and typography and is less common in everyday speech.
Folds or ridges in a body structure, especially the folds of the mucous membrane lining the small intestine.
"The plicae make the intestinal lining highly folded and increase its absorptive surface area."
Chiefly a technical anatomical term, normally used in the plural.
The plural form of plica, a comma-shaped diacritical mark used in certain writing systems.
"The scribe placed the plicae above the consonants to indicate palatalization."
Used in specialized discussion of writing systems, phonetics, and manuscripts.
This is the standard plural of plica. In anatomy, it commonly refers collectively to intestinal folds or ridges.
"Digestive enzymes are present throughout the intestinal plicae."
Your small intestine is ruffled like a folded curtain: those folds, called plicae, help turn a long tube into a remarkably efficient absorption surface.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does plicae come from?
The word comes from Latin plica, meaning “fold” or “crease,” through its plural form plicae. Latin plicare, “to fold,” is the source of English words such as plicate, plication, implicit, and complicated. The anatomical sense is therefore closely related to the original idea of something folded or creased.
How plicae is actually used
The term is chiefly technical. In medicine it is usually used in the plural, while in linguistics it is the standard plural of the singular plica.
Easily confused with plicae
Plica is the singular form of plicae in both anatomical and linguistic contexts.
Plies are layers or thicknesses of a material, whereas plicae are folds or ridges in anatomical tissue.