Source : WordNet®

celery root
     n 1: grown for its thickened edible aromatic root [syn: {celeriac},
           {knob celery}, {root celery}, {turnip-rooted celery}, {Apium
          graveolens rapaceum}]
     2: thickened edible aromatic root of a variety of celery plant
        [syn: {celeriac}]