| pestis siderans | A generally fatal form of plague in which there is an intense bacteraemia with symptoms of profound toxaemia. Synonym: pestis siderans. (05 Mar 2000) |
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| pestivirus | A genus of flaviviridae, also known as mucosal disease virus group, which is not arthropod-borne. Transmission is by direct and indirect contact, and by transplacental and congenital transmission. Species include border disease virus, bovine viral diarrhoea virus (diarrhoea virus, bovine viral), and hog cholera virus. (12 Dec 1998) |
| pestivirus infections | Infections with viruses of the genus pestivirus, family flaviviridae. (12 Dec 1998) |
| pestle | An instrument in the shape of a rod with one rounded and weighted extremity, used for bruising, breaking, grinding, and mixing substances in a mortar. Origin: L. Pistillum, fr. Pinso, or piso, to pound (05 Mar 2000) |