hierobulbum Save DMLBS hierobulbum [LL < ἱερόβολβος] , (name of plant) (?) cowslip or autumn crocus. hieribulbus, ‥ greate wyrt Leechdoms I 14; 10‥ †beribalbum, greate wyrte WW; hierebulbum, cusloppe Gl. Durh..