ExpertGlossary terms starting with P

3,647 terms

  1. put-and-take Refers to a fishery where catchable-sized fish are stocked (typically trout but not exclusively) and caught by anglers in a relatively short period of…
  2. Put-call ratio Since investors buy put options when they expect the market to fall, and call options when they expect the market to rise, the relationship of puts to…
  3. put-in Denotes a boat launching area for the start of a float trip.
  4. Putative Alleged; supposed; reputed.
  5. PUVA therapy (...THAYR-uh-pee) A type of photodynamic therapy used to treat skin conditions such as psoriasis, vitiligo, and skin nodules of cutaneous T-cell lymphoma.
  6. PV A "pointer value", which is Perl Internals Talk for a char*.
  7. PV HCT Photovoltaic Mercury Cadmium Telluride.
  8. PV links A method of LVM configuration that allows you to provide redundant disk interfaces and buses to disk arrays, thereby protecting against single points of…
  9. PV701 A virus that is being studied in the treatment of cancer. It belongs to the family of viruses that cause Newcastle disease in birds.
  10. PVA The Plant Variety Act. See U.S. Department of Agriculture.
  11. PVB Project Validation Board (MILCON term).
  12. PVC Permanent virtual circuit. A network connection with a static route defined in advance, usually by manual setup.
  13. PvE Player vs. Environment. Combat between players and computer controlled opponents.
  14. PVL Prevail
  15. PVO (PVO Strany ) Russian organization formerly responsible for the air and space defense of their homeland.
  16. PVOL (Primary Volume) A primary volume configured in an XP series disk array that uses Continuous Access.
  17. PvP Player vs. Player. This means for one player to attack another player.
  18. PVR Abbreviation for plant variety rights.
  19. PVT Payload Verification Test.
  20. pW Precipitable Water - measure of the depth of liquid water at the surface that would result after precipitating all of the water vapor in a vertical column…
  21. PWAT Precipitable Water - measure of the depth of liquid water at the surface that would result after precipitating all of the water vapor in a vertical column…
  22. PWBS Program Work Breakdown Structure.
  23. PWG Product Working Group.
  24. PWM Abbreviation for pulse-width modulation, which is a deprecated synonym for pulse-duration modulation.
  25. PWO Public Severe Weather Outlook
  26. PWP Abbreviation for permanent wilting point.
  27. pWp0 Abbreviation for picowatts, psophometrically weighted, measured at a zero-dBm transmission level point. See dBm(psoph), psophometer.
  28. PWR Pressurized Water Reactor.
  29. pX Abbreviation for peak envelope power (of a radio transmitter).
  30. PXD101 A substance being studied in the treatment of cancer. PXD101 blocks enzymes needed for cell division and may kill cancer cells.
  31. PY Prior Year.
  32. Pyranometer A device used to measure total incident solar radiation (direct beam, diffuse, and reflected radiation) per unit time per unit area.
  33. pyrazine diazohydroxide A substance that is being studied in the treatment of cancer.
  34. pyrazoloacridine A substance that is being studied in the treatment of cancer. It belongs to the family of drugs called acridines.
  35. pyrethrins Active constituents of pyrethrum (Tanacetum cinerariifolium) flowers, used as insecticides.
  36. Pyrethroid A class of insecticides derived from the natural pyrethrins.
  37. Pyrheliometer A device that measures the intensity of direct beam solar radiation.
  38. pyridoxine (PEER-ih-DOK-seen) A key nutrient that the body needs to break down proteins, carbohydrates, and fats in food for healthy blood, skin, and nerves.
  39. Pyrimidine A single-ring, nitrogen-containing base present in nucleic acid s. Cytosine (C) and thymine (T) are present in DNA, whereas uracil (U) replaces T in RNA.
  40. Pyroclastic Ash mixed with larger igneous rock fragments produced by explosive volcanic eruptions.
  41. Pyroclastic flow High-speed avalanches of hot ash, rock fragments, and gas that move down the sides of a volcano during explosive eruptions or when the steep edge of a…
  42. Pyroclastic surge Similar to a pyroclastic flow, but contains a higher proportion of gas to rock and is more turbulent and faster moving.
  43. pyrogen Bacterial substance that causes fever in mammals.
  44. Pyrolysis The transformation on a compound or material into one or more substances by heat alone (without oxidation). Often called destructive distillation.
  45. pyrophosphate A phosphate ion dimer; may be released on hydrolysis of ATP.
  46. Pyrotechnic A mixture of chemicals which, when ignited, is capable of reacting exothermically to produce light, heat, smoke, sound, or gas, and may be also used to…
  47. pyroxamide (py-ROX-uh-mide) A substance that is being studied in the treatment of cancer. It belongs to the family of drugs called histone deacetylase inhibitors.