Plicare

Plicare is a Latin verb meaning to fold, bend, or weave. It is the present active infinitive of the verb plico, plicare, plicavi, plicatum, belonging to the first conjugation. The root plic- conveys the sense of folding, and it serves as the basis for a range of English terms that denote folds, ridges, or the act of folding.

In English, plicare gives rise to several derivatives used in scientific and practical contexts. The adjective plicate describes something that is folded or pleated, while the noun plication refers to the act or result of folding. The noun plica denotes a fold or ridge, especially within anatomy and botany. Related terms include plicae, the plural of plica, used to name internal folds such as the plicae circulares of the small intestine or the plica semilunaris in the eye. The verb form is represented in English by to plicate or to replicate, the latter coming from a related Latin root via replicare, meaning to fold back or repeat.

Usage in medicine and biology is common. Plication is used to describe procedures that create folds in tissue to reduce volume or reinforce structure, such as gastric plication in bariatric surgery or scleral plication in ophthalmology. In anatomy, plicae or plicae mucosae refer to natural mucosal folds that increase surface area or regulate flow. The term remains chiefly encountered in academic, medical, and biological literature, where it provides a precise way to describe folding-related morphology and processes.