fenestra

fenestra
1. [TA] An anatomic aperture, often closed by a membrane. 2. An opening left in a plaster of Paris cast or other form of fixed dressing in order to permit access to a wound or inspection of the part. 3. The opening in one of the blades of an obstetric forceps. 4. A lateral opening in the sheath of an endoscopic instrument that allows lateral viewing or operative maneuvering. 5. Openings in the wall of a tube, catheter, or trocar designed to promote better flow of air or fluids. SYN: window (1) [TA]. [L. window]
- f. of the cochlea SYN: round window.
- f. cochleae [TA] SYN: round window.
- f. nov-ovalis artificial opening through the otic capsule into the lateral semicircular canal, connecting the membranous labyrinth with the mastoid cavity produced during fenestration surgery.
- f. ovalis SYN: oval window.
- f. rotunda SYN: round window.
- f. of the vestibule SYN: oval window.
- f. vestibuli [TA] SYN: oval window.

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fe·nes·tra fə-'nes-trə n, pl -trae -.trē, -.trī
1) a small anatomical opening (as in a bone): as
a) OVAL WINDOW
b) ROUND WINDOW
2 a) an opening like a window cut in bone (as in the inner ear in the fenestration operation)
b) a window cut in a surgical instrument (as an endoscope)
fe·nes·tral -trəl adj

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n.
(in anatomy) an opening resembling a window. The fenestra ovalis (fenestra vestibuli) - the oval window - is the opening between the middle ear and the vestibule of the inner ear. It is closed by a membrane to which the stapes is attached. The fenestra rotunda (fenestra cochleae) - the round window - is the opening between the scala tympani of the cochlea and the middle ear. Sound vibrations leave the cochlea through the fenestra rotunda which, like the fenestra ovalis, is closed by a membrane.

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fe·nes·tra (fə-nesґtrə) gen. and pl. fenesґtrae [L. “window”] 1. window (def. 1). 2. an opening in a bandage or cast. 3. an opening in the blade of a forceps.

Medical dictionary. 2011.

Look at other dictionaries:

  • FENESTRA — ex Graeco φαινίςτρα, quod a verbo φανίζω; antiquis Fenestra et Festra, ex Graeco φαίςτρα itidem, quod a φαιςτὸς, perspicuus, lucidus: illuminandae domui inservit. Quo fine decorabantur olim ex speculari lapide, aut vitro in tenues laminas fuso,… …   Hofmann J. Lexicon universale

  • fenestra — (del lat. «fenestra»; ant.) f. *Ventana. * * * fenestra. (Del lat. fenestra). f. desus. ventana …   Enciclopedia Universal

  • Fenestra — (lat.), 1) Fenster; daher Fenestragium, im Mittelalter eine Abgabe für das Recht, durch das Fenster verkaufen zu dürfen. 2) (Anat.), Loch im Ohr; Fenestra rotunda u. Fenestra semiovalis, s.u. Ohr; 3) (Bot.), Samennarbe, s. Hilum …   Pierer's Universal-Lexikon

  • fenestra — FENÉSTRA s.f. (anat.) Deschidere în peretele medial al urechii interne. [< lat. fenestra – fereastră]. Trimis de LauraGellner, 23.03.2005. Sursa: DN …   Dicționar Român

  • fenestra — (Del lat. fenestra). f. desus. ventana …   Diccionario de la lengua española

  • Fenestra — Fe*nes tra, n.; pl. {Fenestr[ae]}. [L., a window.] (Anat.) A small opening; esp., one of the apertures, closed by membranes, between the tympanum and internal ear. [1913 Webster] …   The Collaborative International Dictionary of English

  • Fenestra — (lat., »Fenster«), ein Teil des Ohrs, s. Ohr …   Meyers Großes Konversations-Lexikon

  • fenestra — v. finestra …   Enciclopedia Italiana

  • fenestra — [fi nes′trə] n. pl. fenestrae [fi nes′trē΄] [ModL < L, window, prob. < Etr * fnestra] 1. a small opening, as any of the covered oval openings in the inner wall of the middle ear 2. a small, transparent spot, as in the wings of some insects… …   English World dictionary

  • fenestra — n. (in anatomy) an opening resembling a window. The fenestra ovalis (fenestra vestibuli) – the oval window – is the opening between the middle ear and the vestibule of the inner ear. It is closed by a membrane to which the stapes is attached. The …   The new mediacal dictionary

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