yin choy en · NOUN
Etymology
Borrowed from Chinese 莧菜 /苋菜 (jin6 coi3).
Meanings
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(uncountable) A type of Chinese spinach with a purple center used in cooking, Amaranthus tricolor.
He ran them down—aspargus, spinach, bok choy, Chinese broccoli—finally mentioning yin choy, a spinachlike leaf with a purple center called amaranth, or Chinese spinach.
1997, Patricia Unterman, Food Lover's Guide to San Francisco, Chronicle Books, →ISBN, page 46: