| vulvar slit | The cleft between the labia majora. Synonym: rima pudendi, fissura pudendi, pudendal cleavage, pudendal slit, rima vulvae, urogenital cleft, vulvar slit. (05 Mar 2000) |
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| Cheatle slit | A longitudinal incision into the antimesenteric border of the small intestine, which when closed transversely creates a larger lumen than would be possible by simple end-to-end anastomosis; currently modified to include longitudinal incisions into the cut ends of the transected small intestine or other tubular structures, allowing a wide caliber elliptical anastomosis to be performed. (05 Mar 2000) |
| pudendal slit | The cleft between the labia majora. Synonym: rima pudendi, fissura pudendi, pudendal cleavage, pudendal slit, rima vulvae, urogenital cleft, vulvar slit. (05 Mar 2000) |
| slit | <microscopy> A narrow aperture, usually rectangular in shape. (05 Aug 1998) |
| slit lamp | In ophthalmology, an instrument consisting of a combination of a microscope and a narrow beam of collimated light that can be narrowed into a slit and used to examine the eye. Synonym: biomicroscope, Gullstrand's slitlamp. (05 Mar 2000) Previous: slippery, slipping patella, slipping rib, slipping rib cartilage, slitNext: slit lamp, slit microscope, slit pores, slit-shellslit lamp <apparatus, ophthalmology> A special type of examination of the anterior structures of the eye. These include the conjunctiva, sclera, lids, iris, cornea and anterior chamber. The slit lamp is a device which focuses a high intensity light beam (that can be focused as a slit) at the structures of the eye while the examiner looks through a magnifying scope. Eyedrops which numb the eyes and dilate the pupils will often be used prior to examination. The exam is not at all uncomfortable, just time consuming. Diagnoses such as foreign body (to conjunctiva, cornea or sclera), iritis, herpes keratoconjunctivitis, cornmeal ulcer, cataracts, glaucoma and corneal abrasions may be made using this exam. Some foreign bodies can even be removed using the enhanced image amplification of the slit lamp. (19 Jan 1998) |
| slit microscope | <instrument, microscopy> A term applied to particles less than 0.1 ~m in diameter, hence too small to be truly resolved by the light micro- scope. Under the ultramicroscope they look like stars in the sky. Their differences in size are merely indicated by differences in brightness. (05 Aug 1998) |
| slit pores | The intercellular clefts between the interdigitating pedicels of podocytes; they are part of the filtration barrier of renal corpuscles. Synonym: filtration slits. (05 Mar 2000) |
| slit-shell | <zoology> Any species of Pleurotomaria, a genus of beautiful, pearly, spiral gastropod shells having a deep slit in the outer lip. Many fossil species are known, and a few living ones are found in deep water in tropical seas. Source: Websters Dictionary (01 Mar 1998) |
| slit ventricle syndrome | <syndrome> In shunt dependent patients, a state characterised by intermittent or chronic headaches, small ventricles, and slow reflux of the valve mechanism. (05 Mar 2000) |
| radiographic parallel line shadows | The images of bronchial walls, usually thickened; colloq., British. Synonym: radiographic parallel line shadows. (05 Mar 2000) |
| parallel | 1. Pertaining to straight lines or planes that do not intersect. 2. <physics> Pertaining to electric circuit components connected in parallel so that the current flow divides, each branch passing through one component and rejoins, applied by extension to any similar parallel circuit, for example the systemic circulation to the various organs. (18 Nov 1997) |
| parallel attachment | A frictional or mechanically retained unit used in fixed or removable prosthodontics, consisting of closely fitting male and female parts, an attachment that may be rigid in function or may incorporate a movable stress control unit to reduce the torque on the abutment. Synonym: frictional attachment, internal attachment, key attachment, keyway attachment, parallel attachment, slotted attachment. (05 Mar 2000) |
| Parallel Electron Energy Loss Spectroscopy | <technique> Electron energy loss spectroscopy analyses the inelastically scattered electrons present in the beam after it has been transmitted through the sample. An electron energy loss spectrum typically consists of a monatomic decreasing background on which are superimposed a number of peaks. Each peak is characteristic of the scattering process that has occurred in the sample. The peaks can be used to obtain information about the chemical composition and electronic structure of the sample. Electron energy loss spectra are acquired typically in a magnetic sector spectrometer located under the camera chamber of the transmission electron microscope. Spatial resolution is typically limited by the minimum probe diameter of the microscope. Electron energy loss spectroscopy tends to be complimentary to EDS in that it can be used to analyse very thin samples of low Z materials. Acronym: PEELS (05 Aug 1998) |
| parallel rays | Ray's parallel to the axis of an optical system. (05 Mar 2000) |
| parallel track | <pharmacology> A system for distributing certain experimental drugs to people who are unable to participate in ongoing clinical trials. (09 Oct 1997) |