| flare | <microscopy> Unwanted light in an optical instrument that arises by reflection at lens surfaces (including the observer's eyeglasses) and lens barrel, etc., and sometimes from lens aberration. Flare reduces image contrast and may form undesirable focused images and hot spots. Flare in a microscope is reduced by immersion of the condenser and objective lenses, anti-reflection (05 Aug 1998) |
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| flare streaming | <cell biology> Phenomenon described in isolated cytoplasm of giant amoeba when the medium contains Ca and ATP. A loop of cytoplasm flows outward and then returns to the main mass the appearance is reminiscent of flares around the eclipsed sun. (18 Nov 1997) |
| flared teeth | <dentistry> A term used to indicate the position of the teeth. The upper teeth are flared lingually (toward the lip). (08 Jan 1998) |
| aqueous flare | Tyndall phenomenon observed in the fluid of the anterior chamber of the eye. (05 Mar 2000) |
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| weal and flare | <immunology> The vascular changes in the skin in response to mild mechanical injury, an outward spreading zone of reddening flare) followed rapidly by a weal (swelling) at the site of injury. Redness, heat and swelling, three of the cardinal signs of inflammation, are present. (18 Nov 1997) |
| wheal-and-flare reaction | The characteristic immediate reaction observed in the skin test; within 10 to 15 minutes after injection of antigen (allergen), an irregular, blanched, elevated wheal appears, surrounded by an area of erythema (flare). Synonym: wheal-and-flare reaction. (05 Mar 2000) |