pa [ pɑ:, pɔ: ]

• n.
  • an informal term for a father; probably derived from baby talk

    同义词： dad dada daddy papa pappa pop

  • a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

    同义词： protactinium protoactinium atomic number 91

  • a unit of pressure equal to one newton per square meter

    同义词： pascal

  • a Mid-Atlantic state; one of the original 13 colonies

    同义词： Pennsylvania Keystone State

  • an electronic amplification system used as a communication system in public areas

    同义词： public address system P.A. system PA system P.A.

以上来源于: WordNet