WordNet (r) 3.0 (2006):

celery cabbage
    n 1: plant with an elongated head of broad stalked leaves
         resembling celery; used as a vegetable in east Asia [syn:
         Chinese cabbage, celery cabbage, napa, pe-tsai,
         Brassica rapa pekinensis]
    2: elongated head of crisp celery-like stalks and light green
       leaves [syn: Chinese cabbage, celery cabbage, Chinese
       celery]