| vallate papilla | One of eight or ten projections from the dorsum of the tongue forming a row anterior to and parallel with the sulcus terminalis; each papilla is surrounded by a circular trench (fossa) having a slightly raised outer wall (vallum); on the sides of the vallate papilla and the opposed margin of the vallum are numerous taste buds. Synonym: papilla vallata, circumvallate papilla. Vascular papillae, dermal papillae containing vascular loops. (05 Mar 2000) |
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| vallecula | Origin: NL, dim. Fr. L. Vallis, valles, a valley. 1. <anatomy> A groove; a fossa; as, the vallecula, or fossa, which separates the hemispheres of the cerebellum. 2. <botany> One of the grooves, or hollows, between the ribs of the fruit of umbelliferous plants. Source: Websters Dictionary (01 Mar 1998) |
| vallecula cerebelli | A deep hollow on the inferior surface of the cerebellum, between the hemispheres, containing the medulla oblongata and the falx cerebelli. Synonym: vallis. (05 Mar 2000) |
| vallecula epiglottica | A depression immediately posterior to the root of the tongue between the median and lateral glossoepiglottic folds on either side. Synonym: vallecula epiglottica. (05 Mar 2000) |
| vallecula sylvii | The deep depression of the basal surface of the forebrain that corresponds in position to the anterior perforated substance. Bounded medially by the optic tract and rostrally by the orbital surface of the frontal lobe, it extends laterally around the overhanging pole of the temporal lobe into the Sylvian fissure (sulcus lateralis). Synonym: fossa lateralis cerebri, fossa of Sylvius, lateral fossa of brain, vallecula sylvii. (05 Mar 2000) |
| vallecula unguis | The cutaneous furrow in which the lateral border of the nail is situated. Synonym: groove of nail matrix, vallecula unguis. (05 Mar 2000) |
| vallecular dysphagia | Dysphagia caused by food becoming lodged above the epiglottis. Synonym: Barclay-Baron disease. (05 Mar 2000) |
| Valleix's points | Various point's in the course of a nerve, pressure upon which is painful in cases of neuralgia; these point's are: 1) where the nerve emerges from the bony canal; 2) where it pierces a muscle or aponeurosis to reach the skin; 3) where a superficial nerve rests upon a resisting surface where compression is easily made; 4) where the nerve gives off one or more branches; and 5) where the nerve terminates in the skin. Synonym: tender points. (05 Mar 2000) |
| Valleix, Francois | <person> French physician, 1807-1855. See: Valleix's points. (05 Mar 2000) |
| vallet's pills | <medicine> Pills containing sulphate of iron and carbonate of sodium, mixed with saccharine matter. Synonym: Vallet's mass. Origin: From Dr. Vallet of Paris. Source: Websters Dictionary (01 Mar 1998) |
| valley | Origin: OE. Vale, valeie, OF. Valee, valede, F. Vallee, LL. Vallata, L. Vallis, valles. See Vale. 1. The space inclosed between ranges of hills or mountains; the strip of land at the bottom of the depressions intersecting a country, including usually the bed of a stream, with frequently broad alluvial plains on one or both sides of the stream. Also used figuratively. "The valley of the shadow of death." (Ps. Xxiii. 4) "Sweet interchange Of hill and valley, rivers, woods, and plains." (Milton) Deep and narrow valleys with abrupt sides are usually the results of erosion by water, and are called gorges, ravines, canons, gulches, etc. 2. The place of meeting of two slopes of a roof, which have their plates running in different directions, and form on the plan a reentrant angle. The depression formed by the meeting of two slopes on a flat roof. Valley board, a roof having one or more valleys. See Valley, 2, above. Source: Websters Dictionary (01 Mar 1998) |
| valley fever | A fungal infection caused by the fungus Coccidioides immitis. Exists in two forms: primary disease, which is a self-limited respiratory infection (requires no treatment) and a progressive form (diffuse and granulomatous), that can involve almost any part of the body. Approximately 60% of infections cause no symptoms and are identified only by skin testing. Immunocompromised patients (AIDS) are at greatest risk for disseminated disease. Symptoms include cough, anorexia, fever, weight loss and joint pains. Complications include pleural effusion and dissemination. There is a poor prognosis for disseminated disease. Treatment includes amphotericin B for lung infection. Itraconazole and fluconazole are also useful agents. (27 Sep 1997) |
| valley segment | That portion of a stream network with similar morphologies and governing geomorphic processes identified by valley bottom and sideslope geomorphic characteristics. (05 Dec 1998) |
| vallis | Synonym: vallecula cerebelli. Origin: L. Valley (05 Mar 2000) |
| vallum | 1. Any raised, more or less circular ridge. 2. The slightly raised outer wall of the circular depression, or fossa, surrounding a vallate papilla of the tongue. Origin: L. A rampart, fr. Vallus, a stake (05 Mar 2000) |