菜心 càixīn vegetable heart Origin Definitions Defs Strokes Stroke Words Sentences Sents càixīn vegetable heart · choy sum 菜 cài noun vegetable vegetables or greens in general; edible plants心 xīn bud (bound form) the central growing tip of a plant or the stamen of a flowercàixīn vegetable stem 菜 cài noun vegetable vegetables or greens in general; edible plants心 xīn noun center the middle or interior part of something; the core