𩛢

No. “Sour” belongs to a borrowed reading for another character. An early written use appears in the Han-era Cang Jie Pian, a primer for learning Chinese characters, where 𩛢 names cooked rice. Later lexicons Guangya and Yupian gloss it as 饙, rice cooked by steaming. One reading of an old dictionary note links the pronunciation xiū with “sour” while explaining 𩞑, a different character for spoiled rice. This is a sound-based borrowing, not a second food meaning for 𩛢.