choi sum

 
Pronunciation: /tʃɔɪ ˈsʌm/
(also choy sum)

noun

  • a small Chinese cabbage of a variety with mild-tasting leaves and small edible yellow flowers.
    • Brassica rapa variety parachinensis, family Cruciferae

Origin:

Chinese (Cantonese dialect), literally 'vegetable heart'