from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A spiny evergreen tree (Citrus aurantium) native to southern Vietnam and widely cultivated in warmer regions, having globose, reddish-orange, highly acidic fruit.
  • n. The fruit of this tree.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any of various common orange trees yielding sour or bitter fruit; used as grafting stock
  • n. highly acidic orange used especially in marmalade


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