| febrile psychosis | A psychosis following an acute infection, shock, or chronic intoxication; begins as delirium followed by pronounced mental confusion with hallucinations and unsystematised delusions, and sometimes stupor. Synonym: febrile psychosis. (05 Mar 2000) |
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| febrile seizure | <neurology, paediatrics> A convulsion that occurs secondary to a rapid increase in body temperature. Common in infants under two years of age. (27 Sep 1997) |
| febrile urine | Dark coloured, concentrated urine of strong odour, passed by one suffering from fever. Synonym: feverish urine. (05 Mar 2000) |
| febrile urticaria | Urticaria accompanied by slight constitutional symptoms. Synonym: acute urticaria, urticaria acuta, urticaria febrilis. (05 Mar 2000) |
| febris | Synonym: fever. Origin: L. Febris melitensis, infection with Brucella melitensis. See: Brucella melitensis. (05 Mar 2000) |
| febris undulans | <microbiology> A rare infection (less than 200 cases per year in the U.S.) caused by bacteria of the genus Brucella. Human infection results from occupational exposure to infected animals or by ingestion of infected milk, milk products or animal tissue. Symptoms are non-specific and include fever, malaise and weight loss. (27 Sep 1997) |
| february | The second month in the year, said to have been introduced into the Roman calendar by Numa. In common years this month contains twenty-eight days; in the bissextile, or leap year, it has twenty-nine days. Origin: L. Februarius, orig, the month of expiation, because on the fifteenth of this month the great feast of expiation and purification was held, fr. Februa, pl, the Roman festival or purification; akin to februare to purify, expiate. Source: Websters Dictionary (01 Mar 1998) |
| feces | <gastroenterology> The excrement discharged from the intestines, consisting of bacteria, cells exfoliated from the intestines, secretions, chiefly of the liver and a small amount of food residue. Origin: L. Faeces, pl. Of faex = refuse (18 Nov 1997) |
| feces, impacted | A large firm mass of stool formed in the rectum or distal colon. (12 Dec 1998) |
| Fechner, Gustav | <person> German physicist, 1801-1887. See: Weber-Fechner law, Fechner-Weber law. (05 Mar 2000) |
| Fechner-Weber law | The intensity of a sensation varies by a series of equal increments (arithmetically) as the strength of the stimulus is increased geometrically; if a series of stimuli is applied and so adjusted in strength that each stimulus causes a just perceptible change in intensity of the sensation, then the strength of each stimulus differs from the preceding one by a constant fraction; thus, if a just perceptible change in a visual sensation is produced by the addition of 1 candle to an original illumination of 100 candles, 10 candles will be required to produce any change in sensation when the original illumination was one of 1000 candles. Synonym: Fechner-Weber law, Weber's law. (05 Mar 2000) |
| fecial | Pertaining to heralds, declarations of war, and treaties of peace; as, fecial law. Origin: L. Fetialis belonging to the fetiales, the Roman priests who sanctioned treaties and demanded satisfaction from the enemy before a formal declaration of war. Source: Websters Dictionary (01 Mar 1998) |
| fecifork | <entomology> The anal fork on which the larvae of certain insects carry their faeces. Origin: Feces + fork. Source: Websters Dictionary (01 Mar 1998) |
| fecula | Origin: L.faeula burnt tartar or salt of tartar, dim. Of faex, faecis, sediment, dregs: cf. F. Fecule. Any pulverulent matter obtained from plants by simply breaking down the texture, washing with water, and subsidence. Especially: The nutritious part of wheat; starch or farina; called also amylaceous fecula. The green matter of plants; chlorophyll. Source: Websters Dictionary (01 Mar 1998) |
| feculent | Foul. Origin: L. Faeculentus, full of excrement, fr. Faeces, dregs, faeces (05 Mar 2000) |