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Glossary of Meteorological Terms
beginning with letter P
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pannus
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noun (plural panni)
  1. a hanging flap of skin or other tissue, especially one covering the cornea (in trachoma) or cartilage (in rheumatoid arthritis)
parhelic circle
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noun
  1. A luminous halo, each side of the sun parallel to the horizon, caused by refraction of sunlight through ice crystals
pentad
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noun
  1. a group or series of five things
photochemical smog
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noun
  1. air pollution caused by photochemical reactions involving hydrocarbons, nitrogen oxides and other pollutants, especially in still air over cities
pileus
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noun
  1. the cap of a mushroom.
pluvial
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adjective
  1. Of, pertaining to, or produced by rain
pluviometer
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noun
  1. (meteorology) A scientific instrument for measuring the amount of rainfall.
pluvious
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adjective
  1. Of or pertaining to the condition of heavy rain; rainy.
Sarah sat by the fireplace one pluvious evening.
precipitate
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noun verb adjective
pressure
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noun (countable and uncountable; plural: pressures)
  1. (physics) The amount of force that is applied over a given area divided by the size of this area.
Units
  • SI: pascal (Pa) (1 pascal equals 1 newton per square metre)
  • Others: bar (1 bar equals 100000 pascals), barye (Ba) (1 barye equals 0.1 pascal), pounds per square inch (psi, lbf/in2, lb/in2), torr, mmHg, atmosphere (atm)
    1. mental strain caused by one's own or others' expectations on one's own performance
She has been under lately because her boss expects her to get the job done two weeks early.
Synonyms - under the pump, under the gun
pressure gradient
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noun
  1. The rate of decrease (gradient) of pressure in space at a fixed time. The term is sometimes used to denote simply the magnitude of the gradient of the pressure field.
psychrometer
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noun
  1. (meteorology) any of several instruments used to measure the relative humidity of the atmosphere; especially a wet-and-dry-bulb hygrometer
psychrometric chart
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noun psychrometric + chart
(wikipedia, psychrometrics)
  1. a graph or chart showing the relationships of the thermodynamic properties of moist air
psychrometry
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noun (wikipedia, psychrometrics)
  1. the measurement or study of the thermodynamic properties of moist air
pumping
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verb
  1. (present participle of, pump)
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