| fluorophotometry | Measurement of light given off by fluorescein in order to assess the integrity of various ocular barriers. The method is used to investigate the blood-aqueous barrier, blood-retinal barrier, aqueous flow measurements, corneal endothelial permeability, and tear flow dynamics. (12 Dec 1998) |
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| fluoroquinolone | <pharmacology> A new class of antibiotics with a broad spectrum of activity. They are well-absorbed orally, with good tissue penetration and relatively long duration of effect. These agents bind to DNA and impair its replication. They are synthetic antimicrobial agents with the characteristic 4-quinolone ring structure and containing a fluorine moiety at the 6-position. Some members also have a 1-piperazinyl group at the 7-position. Fluoroquinolone agents have greater intrinsic antibacterial activity and a broader antibacterial spectrum than the quinolone agents. Examples include: ciprofloxacin, norfloxacin, cinoxacin, lomefloxacin, enoxacin and ofloxacin. (20 Jun 2000) |
| fluororoentgenography | The photography of images produced on a fluorescent screen by X-rays. (12 Dec 1998) |
| fluoroscope | <instrument, radiology> A fluoroscope is an imaging device that uses X-rays to view internal body structures on a screen. (09 Oct 1997) |
| fluoroscopic | <radiology> Relating to or effected by means of fluoroscopy. (05 Mar 2000) |
| fluoroscopy | <radiology> An X-ray procedure that makes it possible to see internal organs in motion. (12 Dec 1998) |
| fluorosis | <dentistry, orthopaedics> A chronic endemic form of hypoplasia of the dental enamel caused by drinking water with a high fluorine content during the time of tooth formation, and characterised by defective calcification that gives a white chalky appearance to the enamel, which gradually undergoes brown discoloration. Excessive fluoride intake from drinking water with fluoride concentration more than 8 ppm (several cases in Spain), agricultural or industrial contamination (Texas, Arizona). Clinical features: mottling of teeth enamel. X-ray findings: thickening of bony trabecular pattern, best seen in vertebral bodies, progresses to dense uniform symmetrical sclerosis that obliterates bony architectural landmarks, marked periosteal proliferation, ligamentous calcification (especially sacrospinous, sacrotuberous ligaments) (20 Jun 2000) |
| fluorouracil | <drug, oncology> A chemical used in chemotherapy to treat mainly breast, skin and gastrointestinal cancers. It prevents the growth and spread of cancer cells (it is both an antineoplastic and an antimetabolite). Acronym: 5-FU (09 Oct 1997) |