| porcate | <zoology> Having grooves or furrows broader than the intervening ridges; furrowed. Origin: L. Porca a ridge between two furrows. Source: Websters Dictionary (01 Mar 1998) |
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| porcelain | <botany> Purslain. A fine translucent or semitransculent kind of earthenware, made first in China and Japan, but now also in Europe and America; called also China, or China ware. "Porcelain, by being pure, is apt to break." (Dryden) Ivory porcelain, porcelain with a surface like ivory, produced by depolishing. See Depolishing. Porcelain clay. See Clay. <zoology> Porcelain crab, a cowry. Origin: F. Porcelaine, It. Porcellana, orig, the porcelain shell, or Venus shell (Cypraea porcellana), from a dim. Fr. L. Porcus pig, probably from the resemblance of the shell in shape to a pig's back. Porcelain was called after this shell, either on account of its smoothness and whiteness, or because it was believed to be made from it. See Pork. Source: Websters Dictionary (01 Mar 1998) |
| porcelain gallbladder | <radiology> Calcium incrustation of gallbladder wall, 0.6-0.8% of cholecystectomy patients, 80% female, 10-20% develop gallbladder carcinoma, 90% associated with gallstones findings: nonfunctioning gallbladder on oral cholecystogram, highly echogenic shadowing curvilinear sturucture in the gallbladder fossa (Differential diagnosis: stone-filled contracted gall bladder), echogenic gallbladder wall with little acoustic shadowing (Differential diagnosis: emphysematous cholecystitis), scattered irregular clumps of echoes with posterior acoustic shadowing (12 Dec 1998) |
| porcelain inlay | A fused porcelain restoration luted in a cavity prepared in a tooth. (05 Mar 2000) |
| porcelainised | <geology> Baked like potter's lay; applied to clay shales that have been converted by heat into a substance resembling porcelain. Source: Websters Dictionary (01 Mar 1998) |
| porcelanite | <chemical> A semivitrified clay or shale, somewhat resembling jasper. Synonym: porcelain jasper. Origin: Cf. F. Porcelanite. Source: Websters Dictionary (01 Mar 1998) |
| porcellaneous | 1. Of or pertaining to porcelain; resembling porcelain; as, porcelaneous shells. 2. <zoology> Having a smooth, compact shell without pores; said of certain Foraminifera. Source: Websters Dictionary (01 Mar 1998) |
| porch | 1. A covered and inclosed entrance to a building, whether taken from the interior, and forming a sort of vestibule within the main wall, or projecting without and with a separate roof. Sometimes the porch is large enough to serve as a covered walk. See also Carriage porch, under Carriage, and Loggia. "The graceless Helen in the porch I spied Of Vesta's temple." (Dryden) 2. A portico; a covered walk. "Repair to Pompey's porch, where you shall find find us." (Shak) The Porch, a public portico, or great hall, in Athens, where Zeno, the philosopher, taught his disciples; hence, sometimes used as equivalent to the school of the Stoics. It was called "h poikilh stoa. [See Poicile. Origin: F. Porche, L. Porticus, fr. Porta a gate, entrance, or passage. See Port a gate, and cf. Portico. Source: Websters Dictionary (01 Mar 1998) |
| porcine | <zoology> Relating to, affecting, resembling or derived from a pig. (09 Oct 1997) |
| porcine adenoviruses | An obsolete term for viruses of the genus Mastadenovirus, with four recognised serotypes, which can cause a mild upper respiratory tract disease in swine. (05 Mar 2000) |
| porcine epidemic diarrhoea | A disease of pigs caused by the porcine epidemic diarrhoea virus and characterised by acute diarrhoea, with high mortality in piglets. (05 Mar 2000) |
| porcine epidemic diarrhoea virus | A coronavirus causing porcine epidemic diarrhoea in pigs. (05 Mar 2000) |
| porcine graft | A split-thickness graft from a pig, applied to a raw area on a human as a temporary dressing. (05 Mar 2000) |
| porcine haemagglutinating encephalomyelitis virus | A coronavirus causing vomiting, wasting, and encephalomyelitis in young pigs. (05 Mar 2000) |
| porcine herpesvirus 1 | A virus causing pseudorabies in swine and many other mammalian species including horses, cattle, sheep, goats, dogs, and cats. (05 Mar 2000) |