oriacanthum Save DMLBS oriacanthum [orus+acanthus < ἄκανθος] , horseheal, elecampane (Inula helenium). oridanum, eolone GlC O 225; 10‥ horidanum, elene ‥ oriathamum, eolone WW; oriebanum, horshelone Gl. Durh. 304; oridanum, i. heolene Gl. Laud. 1080; oriatanum, elle MS BL Sloane 420 f. 119.