- 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 - bitter orange, Seville orange, sour orange - highly acidic orange used especially in marmalade
--2 is a kind of orange
--2 is a part ofsour orange, Seville orange, bitter orange, bitter orange tree, bigarade, marmalade orange, Citrus aurantium