| poliovirus | <virology> A member of the enterovirus group of Picornaviridae that causes poliomyelitis. (18 Nov 1997) |
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| poliovirus hominis | The picornavirus (genus Enterovirus) causing poliomyelitis in humans; the route of infection is the alimentary tract, but the virus may enter the bloodstream and nervous system, sometimes causing paralysis of the limbs and, rarely, encephalitis; many infections are inapparent; serologic types 1, 2, and 3 are recognised, type 1 being responsible for most paralytic poliomyelitis and most epidemics. Synonym: poliovirus hominis, poliovirus. (05 Mar 2000) |
| poliovirus vaccine | A suspension of formalin-inactivated poliovirus, types I, II, and III, grown in monkey kidney cell tissue culture, used in the united states only for immunization of immunologically deficient patients and for primary immunization of unimmunised adults at risk. (12 Dec 1998) |
| poliovirus vaccine, oral | A live vaccine containing attenuated poliovirus, types I, II, and III, grown in monkey kidney cell tissue culture, used for routine immunization of children against polio. This vaccine induces long-lasting intestinal and humoral immunity. Killed vaccine induces only humoral immunity. Oral poliovirus vaccine should not be administered to immunocompromised individuals or their household contacts. (12 Dec 1998) |
| poliovirus vaccines | Inactivated poliovirus vaccine (IPV), an aqueous suspension of inactivated strains of poliomyelitis virus (types 1, 2, and 3) used by injection; has largely been replaced by the oral vaccine. See: Salk vaccine. (05 Mar 2000) |
| polioviruses | Species of enterovirus causing acute infection in humans and leading to nervous system damage in a minority of cases. Humans are the only natural host, but infection can also occur in non-human primates and experimentally in rodents. (12 Dec 1998) |
| polioviruses, human 1-3 | Species of enterovirus which are the causal agents of poliomyelitis in humans. Three serotypes (strains) exist: brunhilde (type 1), lansing (type 2), and leon (type 3). Transmission is by the faecal-oral route, pharyngeal secretions, or mechanical vector (flies). Both inactivated and live attenuated vaccines have proven effective in combatting the infection. (12 Dec 1998) |
| polish | 1. A smooth, glossy surface, usually produced by friction; a gloss or luster. "Another prism of clearer glass and better polish." (Sir I. Newton) 2. Anything used to produce a gloss. 3. Refinement; elegance of manners. "This Roman polish and this smooth behavior." (Addison) Source: Websters Dictionary (01 Mar 1998) |
| polishing | From Polish. Polishing iron, an iron burnisher; especially, a small smoothing iron used in laundries. Polishing slate. A gray or yellow slate, found in Bohemia and Auvergne, and used for polishing glass, marble, and metals. A kind of hone or whetstone; hone slate. Polishing snake, a tool used in cleaning lithographic stones. Polishing wheel, a wheel or disk coated with, or composed of, abrading material, for polishing a surface. Source: Websters Dictionary (01 Mar 1998) |
| polishing brush | A brush usually mounted in a rotating instrument, used to polish teeth or artificial replacements. (05 Mar 2000) |
| polishing treatment | The final sewage treatment process to further reduce BOD5, suspended solids, and other pollutants. (05 Dec 1998) |
| Politzer | Adam, Austrian otologist, 1835-1920. See: Politzer bag, Politzer method, Politzer's luminous cone. (05 Mar 2000) |
| Politzer bag | A pear-shaped rubber bag used for forcing air through the eustachian tube by the Politzer method. (05 Mar 2000) |
| Politzer method | Inflation of the eustachian tube and tympanum by forcing air into the nasal cavity at the instant the patient swallows. (05 Mar 2000) |
| Politzer's luminous cone | A triangular area at the anterior inferior part of the tympanic membrane, running from the umbo to the periphery, where there is seen a bright reflection of light. Synonym: cone of light, light reflex, Politzer's luminous cone, red reflex, Wilde's triangle. Malacarne's pyramid, a lobule on the undersurface of the cerebellum, the posterior portion of the vermis. (05 Mar 2000) |