campanular,a.|kæmˈpænjʊlə(r)| [f. as prec. + -ar.] Bell-shaped; having a bell-shaped pedicle. 1813Bingley Anim.Biog. III. 270 The campanular wasp.1868Wood Homes without H. xiv. 259 Another species of..Tree Wasp is the Campanular Wasp (Vespa sylvestris).