Noun bitter orange has 2 senses
  1. sour orange, Seville orange, bitter orange, bitter orange tree, bigarade, marmalade orange, Citrus aurantium - any of various common orange trees yielding sour or bitter fruit; used as grafting stock
    --1 is a kind of orange, orange tree
    --1 is a member of genus Citrus
    --1 has parts: bitter orange, Seville orange, sour orange
  2. bitter orange, Seville orange, sour orange - highly acidic orange used especially in marmalade
    --2 is a kind of orange
    --2 is a part of
     sour orange, Seville orange, bitter orange, bitter orange tree, bigarade, marmalade orange, Citrus aurantium
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