| external aperture of cochlear canaliculus | The external opening of the cochlear aqueduct on the temporal bone medial to the jugular fossa. Synonym: apertura externa canaliculi cochleae. (05 Mar 2000) |
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| external aperture of vestibular aqueduct | The external opening of the vestibular aqueduct on the posterior surface of the petrous part of the temporal bone near the groove for the sigmoid sinus. Synonym: apertura externa aqueductus vestibuli. (05 Mar 2000) |
| laryngeal aperture | The aperture between the pharynx and larynx, bounded by the superior edges of the epiglottis (anteriorly), the aryepiglottic folds (laterally), and the mucosa between the arytenoids (posteriorly). Synonym: aditus laryngis, laryngeal aperture. (05 Mar 2000) |
| lateral aperture of the fourth ventricle | One of the two lateral openings of the fourth ventricle into the subarachnoid space at the cerebellopontine angle. Synonym: apertura lateralis ventriculi quarti, foramen lateralis ventriculi quarti, foramen of Key-Retzius, foramen of Luschka, Retzius' foramen. (05 Mar 2000) |
| frontal sinus aperture | One of a pair of openings in the floor of the frontal sinuses in the nasal part of the frontal bone, through which the frontal sinuses communicate with the ethmoidal infundibulum via the frontonasal duct. Synonym: apertura sinus frontalis. (05 Mar 2000) |
| aperture |
The diameter of the primary lens or mirror of a telescope; hence, the best single measure of the light-gathering power of a telescope.
출처: www.fas.org/spp/military/docops/usaf/2020/app-v.ht...
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| aperture |
In photography, the camera lens opening and its relative diameter. Measured in f-stops, such as f/8, f/ I 1, etc. As the number increases, the size of the aperture decreases, thereby reducing the amount of light passing through the lens and striking the film.
출처: www.ackland.org/tours/classes/glossary.html
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| aperture |
A small opening in a plate or sheet. In cameras, the aperture is usually variable in the form of an iris diaphragm and regulates the amount of light which passes through the lens to the film.
출처: www.wrightcolorgraphics.com/a.htm
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| aperture |
A metal block containing a hole through which the radiation (photon or proton) beam passes. Each portal for each patient requires a custom-made aperture. The shape of the hole is the approximate shape of the target being treated by the beam. Every patient has her or his own set of apertures; no other patients use them.
출처: www.llu.edu/proton/patient/glossary.html
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| aperture |
A small opening such as a camera shutter through which light rays pass to expose film when the shutter is open.
출처: history.nasa.gov/EP-95/glossary.htm
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