紫菜薹 zǐcàitái purple choy sum Definitions Defs Origin Strokes Stroke Words Sentences Sents 紫 zǐ adjective purple purple; violet; a color made from a mix of blue and red菜薹 càitái choy sum An annual or biennial herb with oval leaves and yellow flowers grown for its tender stalks and leaves; also called 菜心 càixīn