Tatsoi definition
An Asian plant (Brassica rapa subsp. rosularis) of the mustard family, having dark green, spoon-shaped, edible leaves that grow in a dense rosette.
noun
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Origin of tatsoi
- Ultimately from a Chinese source such as Cantonese taap3 coi3 (akin to Mandarin tācài) Cantonese taap3 to fall down, in reference to its low, spreading rosette of leaves (from Middle Chinese thap) coi3 vegetable bok choy
From American Heritage Dictionary of the English Language, 5th Edition