草石蚕

Thought to be a corruption of Korean 지렁이 (jireong'i, “earthworm”).^[1]

• IPA^(key): [t͡ɕo̞ɾo̞ɡʲi]

草石蚕(ちょろぎ) or 草石蚕(チョロギ) • (chorogi) 

1. Chinese artichoke, Stachys affinis, a perennial plant originating from China
2. the rhizome of S. affinis, eaten as a vegetable
3. (especially) the rhizome pickled and dyed red, served as a traditional New Year dish

As with many terms that name organisms, this term is often spelled in katakana, especially in biological contexts (where katakana is customary).