Daisy, any of several species of flowering plants belonging to the aster family (asteraceae).Daisies are distinguished by a composite flower head composed of 15 to 30 white ray flowers surrounding a …Daisy is the common name for a large number of dicotyledonous flowering plants within the asteraceae (or composite) family, and in particular is associated with the true, common, or english daisy (bellis …Daisy is used as a feminine name, and sometimes as a nickname for people named margaret, after the french name for the oxeye daisy, marguerite.The daisy is the national flower of the netherlands.