A general term for cavity or chamber which may have specific meaning in reference certain organs or sites in the body. The antrum of the stomach (gastric antrum) is a portion before the outlet which is lined by mucosa which does not produce acid. The paranasal sinuses can be referred to as the frontal antrum, ethmoid antrum, and maxillary antrum.
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1. Any nearly closed cavity, particularly one with bony walls. 2. SYN: pyloric a.. [L. fr. G. antron, a cave]
- a. auris SYN: external acoustic meatus.
- cardiac a. a dilation that occasionally occurs in the abdominal part of esophagus. SEE ALSO: abdominal part of esophagus. SYN: a. cardiacum, forestomach.
- a. cardiacum SYN: cardiac a..
- antra ethmoidalia SYN: ethmoid cells, under cell.
- follicular a. the cavity of an ovarian follicle filled with liquor folliculi.
- a. of Highmore SYN: maxillary sinus.
- mastoid a. [TA] a cavity in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aperture of the mastoid a.. SYN: a. mastoideum [TA], tympanic a., Valsalva a..
- a. mastoideum [TA] SYN: mastoid a..
- maxillary a. SYN: maxillary sinus.
- pyloric a. [TA] the initial portion of the pyloric part of the stomach, which may temporarily become partially or completely shut off from the remainder of the stomach during digestion by peristaltic contraction of the prepyloric “sphincter”; it is sometimes demarcated from the second part of the pyloric part of the stomach (pyloric canal) by a slight groove. SYN: a. pyloricum [TA], a. (2) [TA], lesser cul-de-sac.
- a. pyloricum [TA] SYN: pyloric a..
- tympanic a. SYN: mastoid a..
- Valsalva a. SYN: mastoid a..

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an·trum 'an-trəm n, pl an·tra -trə a cavity within a bone (as the maxilla) or hollow organ (as the stomach)

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1. a cavity, especially a cavity in a bone. The mastoid (or tympanic) antrum is the space connecting the air cells of the mastoid process with the chamber of the inner ear.
2. the part of the stomach adjoining the pylorus (pyloric or gastric antrum).

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an·trum (anґtrəm) pl. anґtra, antrums [L., from Gr. antron cave] a cavity or chamber, such as one within a bone or organ. antral adj

Medical dictionary. 2011.

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  • ANTRUM — vulgo S. Hermeland, Insul. Galliae Celticae ad Ligerim fluv. Aliis Antrium, vulgô Aindre. Lloyd. Insul. est amnica, in Ligere fluv. non procul ab huius ore et ab urbe Namnetis. Nomen ei a densis opacisque silvis, in medio sui montosa est, longa… …   Hofmann J. Lexicon universale

  • antrum — àntrum m DEFINICIJA anat. 1. prirodna šupljina u tijelu, osobito u kosti 2. dio želuca koji se proširuje prema dvanaestercu [antrum želuca] ETIMOLOGIJA lat …   Hrvatski jezični portal

  • Antrum — An trum, n.; pl. {Antra}. [L., fr. Gr. ?.] A cavern or cavity, esp. an anatomical cavity or sinus. Huxley. [1913 Webster] || …   The Collaborative International Dictionary of English

  • Antrum — (lat.), 1) Höhle, Grotte, z.B. in Rom A. Caci, A. Fauni et Pici, s. Rom (a. Geogr.); 2) (Anat.), als Theil im menschlichen Körper, z.B. A. buccinōsum. Ohrmuschel, s. u. Ohr; A. Highmōri, Kieferhöhle, s. u. Gesichtsknochen; 3) (Bot.), Fruchthöhle …   Pierer's Universal-Lexikon

  • Antrum — (lat.), Höhle; A. Highmori, die Oberkieferhöhle (s. Schädel) …   Meyers Großes Konversations-Lexikon

  • antrum — (n.) a cave or cavity, late 14c., medical Latin, from Gk. antron cave …   Etymology dictionary

  • antrum — [an′trəm] n. pl. antra [an′trə] or antrums [L < Gr antron, cave < IE * antrom] Anat. a cavity, esp. one within a bone, as either of a pair of sinuses in the upper jaw …   English World dictionary

  • Antrum — In Biology, Antrum is a general term for a cavity or chamber which may have specific meaning in reference to certain organs or sites in the body.Examples include * antrum cardiacum a dilation that occurs in the esophagus near the stomach… …   Wikipedia

  • Antrum — Als Antrum – lateinisch für Höhle, Grotte – wird in der Anatomie eine Ausbuchtung bzw. weitung verschiedener Strukturen bezeichnet. Man unterscheidet das: Antrum cardiacum, eine Ausweitung der Speiseröhre nach deren Durchtritt durch das… …   Deutsch Wikipedia

  • Antrum — Indre (Loire Atlantique) Pour les articles homonymes, voir Indre. Indre La Loire vue depuis Basse Indre …   Wikipédia en Français

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