| glottis | <anatomy> The vocal apparatus of the larynx, consisting of the true vocal cords (plica) vocalis) and the opening between them (rima glottidis). (14 Oct 1997) |
|---|---|
| glottis respiratoria | The opening between the vocal processes of the arytenoid cartilages. Synonym: pars intercartilaginea rimae glottidis, glottis respiratoria, intercartilaginous part of glottic opening. (05 Mar 2000) |
| glottis spuria | The interval between the false vocal cords or vestibular folds. Synonym: false glottis, glottis spuria, rima respiratoria. (05 Mar 2000) |
| glottis vera | The interval between the true vocal cords. Synonym: glottis vera, rima vocalis, true glottis. (05 Mar 2000) |
| glottis vocalis | The portion of the opening anterior to the vocal processes of the arytenoid cartilages bounded by the vocal ligaments. Synonym: pars intermembranacea rimae glottidis, glottis vocalis, intermembranous part of glottic opening. (05 Mar 2000) |
| true glottis | The interval between the true vocal cords. Synonym: glottis vera, rima vocalis, true glottis. (05 Mar 2000) |
| false glottis | The interval between the false vocal cords or vestibular folds. Synonym: false glottis, glottis spuria, rima respiratoria. (05 Mar 2000) |
| angle of aperture | <ophthalmology, optics> The angle formed by lines drawn from the ends of the diameter of a lens to its point of focus. See: angular aperture. (05 Mar 2000) |
| angular aperture | The angle, in air, of light that passes from the object to the ends of the diameter of the front lens of the microscope objective. (05 Mar 2000) |
| anterior nasal aperture | The anterior nasal opening in the skull. Synonym: apertura piriformis, piriform opening. (05 Mar 2000) |
| aperture | <physics> The opening in an optical system which restricts the size of the bundle of rays incident on a given surface. (Usually circular and specified by diameter.) (09 Oct 1997) |
| aperture, angular | <microscopy> The angle between the most divergent rays that can pass through a lens to form the image of an object. The angle subtended between the axis of a lens and the largest accepted angle of the image-forming rays. With microscope objectives the trigonometric sine of this angle is used to define numerical aperture but as measured from the axial object point. (05 Aug 1998) |
| aperture correction | <microscopy> An electronic process used in some high-resolution video cameras and monitors that compensates for the loss in sharpness of detail due to the finite dimensions (aperture) of the scanning beam. (05 Aug 1998) |
| aperture diaphragm | A metal device that limits the area of the beam emerging from an X-ray tube. (05 Mar 2000) |
| aperture, effective | <microscopy> The diameter of the entrance pupil: it is the apparent diameter of the limiting aperture measured from the front. (05 Aug 1998) |