1. A muscular or myovascular device to open (musculus dilator) and to close (musculus sphincter) an orifice or the lumen of an organ. 2. The muscular tissue surrounding and controlling the aboral outlet of the stomach. [L. fr. G. pyloros, a gatekeeper, the p., fr. pyle, gate, + ouros, a warder]

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py·lo·rus pī-'lōr-əs, pə-'lȯr- n, pl py·lo·ri -'lō(ə)r-.ī, -(.)ē the opening from the vertebrate stomach into the intestine see PYLORIC SPHINCTER

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the lower end of the stomach, which leads to the duodenum. It terminates at a ring of muscle - the pyloric sphincter - which contracts to close the opening by which the stomach communicates with the duodenum.
pyloric adj.

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py·lo·rus (pi-lorґəs) [Gr. pyloros, from pylē gate + ouros guard] [TA] the most distal part of the stomach, surrounded by a strong band of circular muscle; the stomach contents are emptied through it into the duodenum. Usage is variable, with the term referring sometimes to the entire pyloric part of the stomach and at others to just a section of it, such as the pyloric antrum, canal, or opening. pyloric adj

Medical dictionary. 2011.

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Look at other dictionaries:

  • Pylorus — Py*lo rus, n.; pl. {Pylori}. [L., fr. Gr. ? pylorus, gate keeper; ? a gate + ? watcher, guardian.] (Anat.) (a) The opening from the stomach into the intestine. (b) A posterior division of the stomach in some invertebrates. [1913 Webster] …   The Collaborative International Dictionary of English

  • Pylōrus — (gr.), 1) Thürhüter; 2) (Anat.), der Pförtner der untern Magenöffnung. Daher Pylorĭcae arterĭae, P. venae, Arterien u. Venen des Pylorus, s. u. Bauch 2) C) a) bb) …   Pierer's Universal-Lexikon

  • pylorus — 1610s, from L.L. pylorus “the lower orifice of the stomach,” from Gk. pyloros “gatekeeper, porter,” from pyle “gate” (see PYLON (Cf. pylon)) + ouros “watcher, guardian” (see WARRANT (Cf. warrant)) …   Etymology dictionary

  • Pylŏrus — (griech.), Pförtner, s. Magen …   Meyers Großes Konversations-Lexikon

  • Pylorus — Pylōrus (grch.), Pförtner (s. Magen); Pylorusstenōse, Verengerung des Magenpförtners; Pylorusresektion, operative Entfernung des Pförtners, bes. bei Magenkrebs …   Kleines Konversations-Lexikon

  • Pylorus — Pylorus, s. Magen …   Herders Conversations-Lexikon

  • Pylorus — Pylorus, Magenpförtner ⇒ Magen …   Deutsch wörterbuch der biologie

  • pylorus — [pī lôr′əs] n. pl. pylori [pī lôr′ī, pə lôr′ī] [LL < Gr pylōros, gatekeeper < pylē, gate + ouros, watchman] the opening, surrounded by muscular tissue, from the stomach into the duodenum, the first part of the small intestine pyloric… …   English World dictionary

  • Pylorus — Infobox Anatomy Name = PAGENAME Latin = valvula pylori GraySubject = 247 GrayPage = 1164 Caption = Outline of stomach, showing its anatomical landmarks. Caption2 = Interior of the stomach. (Pylorus labeled at center left.) System = MeshName =… …   Wikipedia

  • Pylorus — Der Pylorus (gr. πυλωρός [pylōrós], „Pförtner“[1]) ist die ringförmig angeordnete glatte Muskulatur, die sich zwischen dem Antrum des Magens (Antrum pyloricum) und dem Zwölffingerdarm (Duodenum) befindet. Der Pylorus ist in Ruhe geschlossen. Er… …   Deutsch Wikipedia

  • pylorus — pyloric /puy lawr ik, lor , pi /, adj. /puy lawr euhs, lohr , pi /, n., pl. pylori / lawr uy, lohr uy/. Anat. the opening between the stomach and the duodenum. See diag. under intestine. [1605 15; < LL < Gk pylorós lit., gatekeeper] * * * ▪… …   Universalium

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