Plant of the genus Buphthalmum with daisy-like flower heads (2-3)
(Other definitions for ox-eye that I've seen before include "small window" , "Daisy-like plant" .)
(Other definitions for oxeye that I've seen before include "A daisy, the marguerite" , "Wild chrysanthemum" , "White and yellow daisy" , "Wild daisy" , "Daisy plant" .)