ˈsea-holly The plant eryngo. 1548Turner Names of Herbes (E.D.S.) 36 Eryngium is named in englishe sea Hulver or sea Holly.1642Rates Merchandizes 48 Sea-holly rootes.1741Compl.Fam.-Piece ii. iii. 374 Buphthalmums, Sea Holly, Sea Ragwort.1882Garden 15 Apr. 249/1 The ordinary Sea Hollies.