cel·ery \ˈsel(ə)rē, -ri\noun (-es) Etymology: probably from Italian dialect (Lombardy) seleri, plural of selero, modification of Late Latin selinon, from Greek 1.: a European herbaceous plant (Apium graveolens); specifically: one of a cultivated variety (A. graveolens dulce) the leafstalks of which are eaten raw or cooked 2.alsocelery grass: tape grass