| 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an aqueous suspension of inactivated strains of poliomyelitis virus (types 1, 2, and 3) used by injection; has largely been replaced by the oral vaccine.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) |
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| 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) |
| politzerization | <medicine> The act of inflating the middle ear by blowing air up the nose during the act of swallowing; so called from Prof. Politzer of Vienna, who first practiced it. Source: Websters Dictionary (01 Mar 1998) |
| polka fever | Tropical disease caused by a flavivirus (one of the arboviruses), transmitted by mosquitoes. A more serious complication is dengue shock syndrome, a haemorrhagic fever probably caused by an immune complex hypersensitivity after re exposure. (18 Nov 1997) |
| polkissen of Zimmermann | Synonym: extraglomerular mesangium. Origin: Ger. Polkissen, pole + cushion (05 Mar 2000) |
| poll | 1. To remove the poll or head of; hence, to remove the top or end of; to clip; to lop; to shear; as, to poll the head; to poll a tree. "When he [Absalom] pollled his head." (2 Sam. Xiv. 26) "His death did so grieve them that they polled themselves; they clipped off their horse and mule's hairs." (Sir T. North) 2. To cut off; to remove by clipping, shearing, etc.; to mow or crop; sometimes with off; as, to poll the hair; to poll wool; to poll grass. "Who, as he polled off his dart's head, so sure he had decreed That all the counsels of their war he would poll off like it." (Chapman) 3. <zoology> The European chub. See Pollard, 3 . Poll book, a register of persons entitled to vote at an election. 4. <veterinary> Poll evil, an inflammatory swelling or abscess on a horse's head, confined beneath the great ligament of the neck. Origin: Akin to LG. Polle the head, the crest of a bird, the top of a tree, OD. Pol, polle, Dan. Puld the crown of a hat. (21 Jun 1999) |