| hot flash | Colloquialism for one of the vasomotor symptoms of the climacteric that may involve the whole body as a flash of heat; also used interchangeably with hot flush. (05 Mar 2000) |
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| hot flashes | A sudden, temporary sensation of heat predominantly experienced by some women during menopause. (12 Dec 1998) |
| 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) |
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| flash | 1. A pool. 2. <engineering> A reservoir and sluiceway beside a navigable stream, just above a shoal, so that the stream may pour in water as boats pass, and thus bear them over the shoal. <mechanics> Flash wheel, a paddle wheel made to revolve in a breast or curved water way, by which water is lifted from the lower to the higher level. Origin: OE. Flasche, flaske; cf. OF. Flache, F. Flaque. Source: Websters Dictionary (01 Mar 1998) |
| flash blindness | A temporary loss of vision produced when retinal light-sensitive pigments are bleached by light more intense than that to which the retina is physiologically adapted at that moment. (05 Mar 2000) |
| flash burn | A burn due to very brief exposure to intense radiant heat; the typical burn produced by atomic explosion. (05 Mar 2000) |
| flash dispersal | The property of rapid disintegration of a tablet when placed on the tongue. (05 Mar 2000) |
| flash evaporator | <apparatus> An apparatus used to concentrate a solute by evaporating its solvent. The device is fairly simple: a heated, rotating glass sphere with an exhaust tube to let the solvent fumes to escape. (09 Oct 1997) |
| flash keratoconjunctivitis | 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) |
| flash method | Sterilization of milk by raising it rapidly to a temperature of 178캟, holding it there for a short time, and reducing it rapidly to 40캟. (05 Mar 2000) |
| flash point | The lowest temperature at which vapors of a liquid may be ignited by a flame. (05 Mar 2000) |
| hot | 1. Having much sensible heat; exciting the feeling of warmth in a great degree; very warm; opposed to cold, and exceeding warm in degree; as, a hot stove; hot water or air. "A hotvenison pasty." 2. Characterised by heat, ardor, or animation; easily excited; firely; vehement; passionate; violent; eager. "Achilles is impatient, hot, and revengeful." (Dryden) "There was mouthing in hot haste." (Byron) 3. Lustful; lewd; lecherous. 4. Acrid; biting; pungent; as, hot as mustard. Hot bed, an iron platform in a rolling mill, on which hot bars, rails, etc, are laid to cool. <botany> Hot wall, a receptacle for the hot water drawn from the condenser by the air pump. This water is returned to the boiler, being drawn from the hot well by the feed pump. In hot water (Fig), in trouble; in difficulties. Synonym: Burning, fiery, fervid, glowing, eager, animated, brisk, vehement, precipitate, violent, furious, ardent, fervent, impetuous, irascible, passionate, hasty, excitable. Origin: OE. Hot, hat, AS. Hat; akin to OS. Het, D. Heet, OHG. Heiz, G. Heiss, Icel. Heitr, Sw. Het, Dan. Heed, hed; cf. Goth. Heito fever, hais torch. Cf. Heat. Source: Websters Dictionary (01 Mar 1998) |
| hot abscess | A recently formed abscess with little or no fibrosis in the wall of the cavity. Synonym: hot abscess. (05 Mar 2000) |
| hot-blooded | Having hot blood; excitable; high-spirited; irritable; ardent; passionate. Source: Websters Dictionary (01 Mar 1998) |
| hot bone lesions | <radiology> Non-routine localised hot bone lesions: Paget's disease, osteoid osteoma, fibrous dysplasia, melorheostosis generalised: hyperparathyroidism, haematologic disorders, Paget disease (rare), fibrous dysplasia, renal osteodystrophy (12 Dec 1998) |
| hot cell | <radiobiology> Heavily radiation-shielded enclosure in which radioactive materials can be handled by persons using remote manipulators and viewing the materials through shielded windows or periscopes. (09 Oct 1997) |
| hot flush | <symptom> A sensation of heat and flushing that occurs suddenly. May be associated with menopause or some medications. (09 Oct 1997) |