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English - English (Wordnet) dictionary (also found in English - Vietnamese, Computing (FOLDOC))
pa
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Noun
  • an electronic amplification system used as a communication system in public areas
  • a Mid-Atlantic state; one of the original 13 colonies
  • a unit of pressure equal to one newton per square meter
  • a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
  • an informal term for a father; probably derived from baby talk
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