the GNU version of the Collaborative International Dictionary of English
n. A biennial umbelliferous plant (Apium graveolens) native of the seacoats of Europe and Asia. When deprived of its acrid and even poisonous properties by cultivation, it becomes celery.
The Century Dictionary and Cyclopedia
n. The celery-plant, Apium graveolens, especially in its wild State.
Word Usage
"Celery Celery, Apium graveolens, is the mild, enlarged version of a bitter, thin-stalked Eurasian herb called smallage."