| hay fever | <chest medicine> An inflammatory response in the nasal passages to an allergic stimulus. Often includes: nasal congestion, sneezing, runny or itchy nose. (27 Sep 1997) |
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| hay | Grass cut and cured for fodder. "Make hay while the sun shines." (Camden) "Hay may be dried too much as well as too little." (C. L. Flint) Hay cap, a canvas covering for a haycock. <medicine> Hay fever, nasal catarrh accompanied with fever, and sometimes with paroxysms of dyspnoea, to which some persons are subject in the spring and summer seasons. It has been attributed to the effluvium from hay, and to the pollen of certain plants. It is also called hay asthma, hay cold, and rose fever. Hay knife, a sharp instrument used in cutting hay out of a stack or mow. Hay press, a press for baling loose hay. Hay tea, the juice of hay extracted by boiling, used as food for cattle, etc. Hay tedder, a machine for spreading and turning newmown hay. Origin: OE. Hei, AS. Hg; akin to D. Kooi, OHG. Hewi, houwi, G. Heu, Dan. & Sw. Ho, Icel. Hey, ha, Goth. Hawi grass, fr. The root of E. Hew. See Hew to cut. Source: Websters Dictionary (01 Mar 1998) |
| hay bacillus | <bacteria> Bacillus subtilis is a Gram-positive, rod-shaped, nonpathogenic bacterium which lives in soil. Its genome has been widely studied and is frequently used in genetic engineering and microbiology experiments. (09 Oct 1997) |
| timothy-hay bacillus | A saprophytic bacterium widely distributed in soil and dust and on plants. (12 Dec 1998) |
| actinic conjunctivitis | Acute keratoconjunctivitis resulting from exposure to intense ultraviolet irradiation. Synonym: actinic conjunctivitis, arc-flash conjunctivitis, flash keratoconjunctivitis, ophthalmia nivalis, snow conjunctivitis, welder's conjunctivitis. (05 Mar 2000) |
| acute catarrhal conjunctivitis | An obsolete term for conjunctivitis with marked hyperaemia and mucopurulent discharge, with a tendency toward spontaneous recovery. Synonym: mucopurulent conjunctivitis. (05 Mar 2000) |
| acute contagious conjunctivitis | An obsolete term for an acute conjunctivitis marked by intense hyperaemia and profuse mucopurulent discharge. Synonym: acute epidemic conjunctivitis, pinkeye. (05 Mar 2000) |
| acute epidemic conjunctivitis | An obsolete term for an acute conjunctivitis marked by intense hyperaemia and profuse mucopurulent discharge. Synonym: acute epidemic conjunctivitis, pinkeye. (05 Mar 2000) |
| acute follicular conjunctivitis | An obsolete term for acute viral conjunctivitis. (05 Mar 2000) |
| acute haemorrhagic conjunctivitis | Specific acute endemic conjunctivitis with eyelid swelling, tearing, conjunctival haemorrhages, and follicles; usually caused by Enterovirus type 70. (05 Mar 2000) |
| acute viral conjunctivitis | An epidemic inflammation of the conjunctiva marked by follicles, especially in the lower fornix; may be caused by adenoviruses, herpesvirus, and Newcastle disease virus. (05 Mar 2000) |
| allergic conjunctivitis | <ophthalmology> An inflammatory condition of the conjunctiva secondary to an allergic stimulus. Common symptoms include itchy, red and tearing eyes (27 Sep 1997) |
| angular conjunctivitis | A subacute bilateral conjunctival inflammation sometimes caused by the Moraxella bacillus, marked by redness of the lateral canthi and scanty, stringy discharge that adheres to the lashes. Synonym: Moraxella conjunctivitis. (05 Mar 2000) |
| arc-flash conjunctivitis | Acute keratoconjunctivitis resulting from exposure to intense ultraviolet irradiation. Synonym: actinic conjunctivitis, arc-flash conjunctivitis, flash keratoconjunctivitis, ophthalmia nivalis, snow conjunctivitis, welder's conjunctivitis. (05 Mar 2000) |
| bacterial conjunctivitis | <pathology> A bacterial infection of a portion of the eye known as the conjunctiva. Common symptoms include redness of the eyes with a thick, often coloured purulent discharge. (27 Sep 1997) |