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1. Oxford American Dictionary

   true north

   • IPA[tro͞o nôrTH]

   美式

   • n.
     north according to the earth's axis, not magnetic north

   • noun: true north

2. • 釋義

   n.

   名詞

   • 1. north according to the earth's axis, not magnetic north compass readings vary from 7.9° to 6.7° west of true north