n.; pl. villi
one of many short finger-like processes that project from some membranous surfaces. Numerous intestinal villi line the small intestine. Each contains a network of blood capillaries and a lacteal. Their function is to absorb the products of digestion and they greatly increase the surface area over which this can take place. Chorionic villi are folds of the chorion (the outer membrane surrounding a fetus) from which the fetal part of the placenta is formed. They provide an extensive area for the exchange of oxygen, carbon dioxide, nutrients, and waste products between maternal and fetal blood.

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  • Villus — (Latin: shaggy hair [] Tiscali UK Reference encyclopedia] , plural villi) can refer to: * Intestinal villus. This is the most common meaning when not more precisely… …   Wikipedia

  • villus — 1704, pl. villi, from L. villus “tuft of hair, shaggy hair” (see VELVET (Cf. velvet)) …   Etymology dictionary

  • Villus — Vil lus, n.; pl. {Villi}. [L., shaggy hair, a tuft of hair.] 1. (Anat.) One of the minute papillary processes on certain vascular membranes; a villosity; as, villi cover the lining of the small intestines of many animals and serve to increase the …   The Collaborative International Dictionary of English

  • Villus — (lat.), Zotte; daher Villös, zottig, flockig, faserig, rauh. Villosa tunica intestinorum, innere Haut der Gedärme …   Pierer's Universal-Lexikon

  • villus — ► NOUN (pl. villi) Anatomy ▪ any of numerous minute elongated projections set closely together on a surface, especially in the absorbent lining of the small intestine. DERIVATIVES villous adjective. ORIGIN Latin, shaggy hair …   English terms dictionary

  • villus — [vil′əs] n. pl. villi [vil′ī΄] [L, shaggy hair, tuft of hair, var. of vellus, a fleece, WOOL] 1. Anat. any of numerous hairlike or fingerlike vascular processes on certain mucous membranes of the body, as of the small intestine, serving to… …   English World dictionary

  • villus — /vil euhs/, n., pl. villi /vil uy/. 1. Anat., Zool. one of the minute, wormlike processes on certain membranes, esp. on the mucous membrane of the small intestine, where they serve in absorbing nutriment. 2. Bot. one of the long, soft, straight… …   Universalium

  • villus — 1. A projection from the surface, especially of a mucous membrane. If the projection is minute, as from a cell surface, it is termed a microvillus. 2. An elongated dermal papilla projecting into an intraepidermal …   Medical dictionary

  • villus — UK [ˈvɪlʌs] / US noun [countable] Word forms villus : singular villus plural villi UK [ˈvɪlaɪ] / US biology 1) one of a large number of small parts that stick out from the inner wall of the small intestine 2) a part like a hair that grows on a… …   English dictionary

  • Villus, S. — S. Villus soll nach Migne zu Madrid in Verehrung stehen …   Vollständiges Heiligen-Lexikon

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