orifice

Any aperture or opening. SEE ALSO: aperture, opening, os, ostium, meatus. SYN: orificium [TA]. [L. orificium]
- anal o. SYN: anus.
- aortic o. [TA] the opening from the left ventricle into the ascending aorta; it is guarded by the aortic valve. SYN: ostium aortae [TA], aortic ostium.
- cardiac o. SYN: cardial o..
- cardial o. [TA] the trumpet-shaped opening of the esophagus into the stomach. SYN: ostium cardiacum [TA], cardiac opening, cardiac o., esophagogastric o..
- esophagogastric o. SYN: cardial o..
- external urethral o. [TA] 1. the slitlike opening of the urethra in the glans penis; 2. the external o. of the urethra (in the female) in the vestibule, usually upon a slight elevation, the papilla urethrae. SYN: ostium urethrae externum [TA], external urinary meatus, external opening of urethra, meatus urinarius, orificium urethrae externum.
- filling internal urethral o. [TA] the internal urethral o. once the bladder begins to be distended with urine, when the trigonal muscles are contracted and the detrusor muscle is relaxed; during this stage the o. occurs at a higher level, and is bounded by a different portion of the mucosa, than during voiding. SEE ALSO: voiding internal urethral o.. SYN: ostium urethrae internum accipiens [TA].
- gastroduodenal o. SYN: pyloric o..
- golf-hole ureteral o. a circular and often escessively lateral ureteral o. that may be associated with vesicoureteral reflux, previous bladder surgery, or tuberculosis.
- ileal o. [TA] the opening of the terminal ileum into the large intestine at the transition between the cecum and the ascending colon. SYN: ostium ileale [TA], o. of ileal papilla, ileocecal opening, ileocecal o., ostium ileocecale.
- o. of ileal papilla ileal o..
- ileocecal o. SYN: ileal o..
- o. of inferior vena cava SYN: opening of inferior vena cava.
- internal urethral o. [TA] the internal opening or o. of the urethra, at the anterior and inferior angle of the trigone. SYN: ostium urethrae internum [TA], internal urethral opening.
- left atrioventricular o. [TA] an atrioventricular opening that leads from the left atrium into the left ventricle of the heart. SYN: ostium atrioventriculare sinistrum [TA], mitral o., ostium arteriosum.
- mitral o. SYN: left atrioventricular o..
- pulmonary o. SYN: opening of pulmonary trunk.
- pyloric o. [TA] the opening between the stomach and the superior part of the duodenum. SYN: ostium pyloricum [TA], gastroduodenal o..
- right atrioventricular o. [TA] an atrioventricular opening that leads from the right atrium into the right ventricle of the heart. SYN: ostium atrioventriculare dextrum [TA], ostium venosum cordis, tricuspid o..
- root canal o. an opening in the pulp chamber leading to the root canal.
- o. of superior vena cava SYN: opening of superior vena cava.
- tricuspid o. SYN: right atrioventricular o..
- ureteric o. [TA] the opening of the ureter in the bladder, situated one at each lateral angle of the trigone; wide gaping of the ostium usually indicates vesicoureteral reflux. SYN: ostium ureteris [TA], orificium ureteris, ureteral meatus, ureteral opening.
- o. of uterus SYN: external os of uterus.
- vaginal o. [TA] the narrowest portion of the canal, in the floor of the vestibule posterior to the urethral o.. SYN: ostium vaginae [TA], orificium vaginae, vaginal opening.
- o. of vermiform appendix [TA] the opening of the vermiform appendix into the lumen of the cecum. SYN: ostium appendicis vermiformis [TA], ostium of vermiform appendix.
- voiding internal urethral o. [TA] the internal urethral o. when the bladder is being emptied of urine, when the trigonal muscles are relaxed and the detrusor muscle is contracting; during this stage the o. occurs at a lower level, and is bounded by a different portion of the mucosa, than during filling and reserving. SEE ALSO: filling internal urethral o.. SYN: ostium urethrae internum evacuans [TA].

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or·i·fice 'ȯr-ə-fəs, 'är- n an opening through which something may pass
or·i·fi·cial .ȯr-ə-'fish-əl, .är- adj

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or·i·fice (orґĭ-fis) [L. orificium] 1. the entrance or outlet of a body cavity. Called also ostium [TA]. any 2. foramen, meatus, or opening. Called also ostium [TA] and orificium. orificial adj

Medical dictionary. 2011.

Synonyms:

Look at other dictionaries:

  • orifice — [ ɔrifis ] n. m. • 1304; lat. orificium 1 ♦ Anat. Ouverture faisant communiquer un conduit, un organe avec une structure voisine ou avec l extérieur. ⇒ méat, pore; cloaque. 2 ♦ (1500) Ouverture qui fait communiquer une cavité naturelle ou… …   Encyclopédie Universelle

  • orifice — ORIFICE. s. m. Ouverture qui sert comme de bouche, ou d entrée à certaines parties du dedans du corps de l animal. L orifice de l estomac, l orifice superieur, l orifice inferieur, l orifice de la matrice, l orifice de la vessie. Il se dit aussi …   Dictionnaire de l'Académie française

  • Orifice — Or i*fice, n. [F., from L. orificium; os, oris, a mouth + facere to make. See {Oral}, and {Fact}.] A mouth or aperture, as of a tube, pipe, etc.; an opening; as, the orifice of an artery or vein; the orifice of a wound. Shak. [1913 Webster] Etna… …   The Collaborative International Dictionary of English

  • orifice — (n.) 1540s, from M.Fr. orifice the opening of a wound (14c.), from L. orificium an opening, lit. mouth making, from os (gen. oris) mouth (see ORAL (Cf. oral)) + facere make (see FACTITIOUS (Cf. factitious)) …   Etymology dictionary

  • orifice — *aperture, interstice …   New Dictionary of Synonyms

  • orifice — [n] opening aperture, cavity, crack, hole, mouth, outlet, slit, spout, vent, window; concept 513 …   New thesaurus

  • orífice — sustantivo masculino 1. Uso/registro: restringido. Artesano que trabaja el oro …   Diccionario Salamanca de la Lengua Española

  • orifice — Orifice, Os, Orificium …   Thresor de la langue françoyse

  • orífice — (Del lat. aurĭfex, ĭcis; de aurum, oro, y facĕre, hacer). m. Artífice que trabaja en oro …   Diccionario de la lengua española

  • orifice — ► NOUN ▪ an opening, particularly one in the body such as a nostril. ORIGIN French, from Latin os mouth + facere make …   English terms dictionary

  • orifice — [ôr′ə fis, är′ə fis] n. [Fr < LL orificium < L os (gen. oris), a mouth (see ORAL) + ficere < facere, to make, DO1] a mouth or aperture of a tube, cavity, etc.; opening orificial [ôr′əfish′əl, är′əfish′əl] adj …   English World dictionary


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