| fog | 1. Watery vapor condensed in the lower part of the atmosphere and disturbing its transparency. It differs from cloud only in being near the ground, and from mist in not approaching so nearly to fine rain. See Cloud. 2. A state of mental confusion. Fog alarm, Fog bell, Fog horn, etc, a bell, horn, whistle or other contrivance that sounds an alarm, often automatically, near places of danger where visible signals would be hidden in thick weather. Fog bank, a mass of fog resting upon the sea, and resembling distant land. Fog ring, a bank of fog arranged in a circular form, often seen on the coast of Newfoundland. Origin: Dan. Sneefog snow falling thick, drift of snow, driving snow, cf. Icel. Fok spray, snowdrift, fj?? snowstorm, fj?ka to drift. <photography> To show indistinctly or become indistinct, as the picture on a negative sometimes does in the process of development. <agriculture> A second growth of grass; aftergrass. Dead or decaying grass remaining on land through the winter; called also foggage. Sometimes called, in new England, old tore. In Scotland, fog is a general name for moss. Origin: Cf. Scot. Fog, fouge, moss, foggag? rank grass, LL. Fogagium, W. Ffug dry grass. Source: Websters Dictionary (01 Mar 1998) |
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| fog'gage | <agriculture> See 1st Fog. Source: Websters Dictionary (01 Mar 1998) |
| Fogarty catheter | A catheter with an inflatable balloon near its tip; used to remove arterial emboli and thrombi from major veins (e.g., iliofemoral) and to remove stones from the biliary ducts. Synonym: balloon-tip catheter. (05 Mar 2000) |
| Fogarty clamp | A clamp with rubber-shod blades having serrated surfaces, to provide an atraumatic grip on tissues. (05 Mar 2000) |
| Fogarty, Thomas | <person> U.S. Thoracic surgeon, *1934. See: Fogarty catheter, Fogarty clamp. (05 Mar 2000) |
| fogging | A method of refraction in which accommodation is relaxed by overcorrection with a convex spherical lens. (05 Mar 2000) |
| fogging retinoscopy | The method of reducing vision with convex lenses until accommodation is suspended; a static, noncycloplegic technique. (05 Mar 2000) |
| foggy | 1. Filled or abounding with fog, or watery exhalations; misty; as, a foggy atmosphere; a foggy morning. 2. Beclouded; dull; obscure; as, foggy ideas. "Your coarse, foggy, drowsy conceit." (Hayward) Origin: From 4th Fog. Source: Websters Dictionary (01 Mar 1998) |
| fogo selvagem | A form of pemphigus foliaceus, occurring in southern Brazil, in which the lesions are bullous, appear localised to the face and upper trunk, become widespread, variegated, erythrodermic, and exfoliative, and are immunologically indistinguishable from pemphigus foliaceus or vulgaris. Synonym: Brazilian pemphigus, wildfire. Origin: Pg. Wild fire (05 Mar 2000) |