oxeye n any North American shrubby perennial herb of the genus Heliopsis having large yellow daisylike flowers n Eurasian perennial herbs having daisylike flowers with yellow rays and dark centers n an oval or round dormer window Usage(s) Hierba amargosa means ragweed, hierba amarilla means an oxeye daisy, and so on down to hierba velluda meaning bulbous buttercup. Synonym(s) heliopsis