Refers specifically to the root vegetable Apium graveolens var. rapaceum. Also known as セロリアーク.
See also: セロリアーク
根セロリはスープやサラダによく使われる。
Celeriac is often used in soups and salads.
Compound of 根 (ne, 'root') and セロリ (serori, 'celery'), literally 'root celery'.