sour orange meaning and definition

SOUR ORANGE noun

Definition of sour orange (noun)

1. any of various common orange trees yielding sour or bitter fruit; used as grafting stock
   • synonyms: bigarade, bitter orange, bitter orange tree, Citrus aurantium, marmalade orange, Seville orange
2. highly acidic orange used especially in marmalade
   • synonyms: bitter orange, Seville orange