| SAEB | sinoatrial entrance block |
|---|---|
| SL | sarcolemma; sclerosing leukoencephalopathy; secondary leukemia; segment length; sensation level; sen... |
| SLE | slit lamp examination; St. Louis encephalitis; systemic lupus erythematosus |
| SVS | slit ventricle syndrome; Society for Cardiovascular Surgery |
| ESD | Entrance surface dose |
|---|---|
| SLE | Slit lamp examination |
| SLIT | Sublingual immunotherapy |
| entrance | 1. The act of entering or going into; ingress; as, the entrance of a person into a house or an apartment; hence, the act of taking possession, as of property, or of office; as, the entrance of an heir upon his inheritance, or of a magistrate into office. 2. Liberty, power, or permission to enter; as, to give entrance to friends. 3. The passage, door, or gate, for entering. "Show us, we pray thee, the entrance into the city." (Judg. I. 24) 4. The entering upon; the beginning, or that with which the beginning is made; the commencement; initiation; as, a difficult entrance into business. "Beware of entrance to a quarrel." "St. Augustine, in the entrance of one of his discourses, makes a kind of apology." (Hakewill) 5. The causing to be entered upon a register, as a ship or goods, at a customhouse; an entering; as, his entrance of the arrival was made the same day. 6. The angle which the bow of a vessel makes with the water at the water line. The bow, or entire wedgelike forepart of a vessel, below the water line. Origin: OF. Entrance, fr. OF. & F. Entrant, p. Pr. Of entrer to enter. See Enter. Source: Websters Dictionary (01 Mar 1998) |
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| entrance block | An incompletely understood mechanism whereby a pacemaker is protected from being discharged by the impulse from another centre; the mechanism, usually conceived as an encircling zone of unidirectionally refractory tissue permitting egress of impulses from the centre but preventing access to the centre, is seen in operation in ventricular parasystole where the parasystolic centre is protected from discharge by the sinus pacemaker and so is able to maintain its intrinsic rhythm undisturbed. Synonym: entrance block, protection. (05 Mar 2000) |
| entrance pupil | <microscopy> The apparent size of the limiting aperture of a lens or lens system (properly that of the diaphragm), as seen from the object plane. This can shift and become a complex matter in some circumstances. In a properly set up microscope system it should be that of the substage iris diaphragm. (05 Aug 1998) |
| 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) |
| 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) |
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