The Collaborative International Dictionary of English v.0.48:
Daisy \Dai"sy\ (d[=a]"z[y^]), n.; pl. Daisies (d[=a]"z[i^]z).
[OE. dayesye, AS. d[ae]ges-e['a]ge day's eye, daisy. See
Day, and Eye.] (Bot.)
(a) A genus of low herbs (Bellis), belonging to the family
Composit[ae]. The common English and classical daisy is
Bellis perennis, which has a yellow disk and white or
(b) The whiteweed (Chrysanthemum Leucanthemum), the plant
commonly called daisy in North America; -- called also
oxeye daisy. See Whiteweed.
Note: The word daisy is also used for composite plants of
other genera, as Erigeron, or fleabane.
Michaelmas daisy (Bot.), any plant of the genus Aster, of
which there are many species.
Oxeye daisy (Bot.), the whiteweed. See Daisy
[1913 Webster] daisybush