daisy

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of several plants of the composite family, especially.
• noun A widely naturalized Eurasian plant (Leucanthemum vulgare syn. Chrysanthemum leucanthemum) having flower heads with a yellow center and white rays.
• noun A low-growing plant (Bellis perennis) native to Europe and widely naturalized, having flower heads with white or pinkish rays.
• noun The flower head of any of these plants.
• noun Slang One that is deemed excellent or notable.

from The Century Dictionary.

• noun A kind of sea-anemone, Actinia bellis.
• noun A common plant, Bellis perennis, natural order Compositæ, one of the most familiar wild plants of Europe, found in all pastures and meadows, and growing at a considerable height on mountains.
• noun One of various plants of other genera to which the name is popularly applied.
• noun Something pretty, fine, charming, or nice: as, she is a daisy.
• Pretty; fine; charming; nice.

from the GNU version of the Collaborative International Dictionary of English.

• noun A genus of low herbs (Bellis), belonging to the family Compositæ. The common English and classical daisy is Bellis perennis, which has a yellow disk and white or pinkish rays.
• noun The whiteweed (Chrysanthemum Leucanthemum), the plant commonly called daisy in North America; -- called also oxeye daisy. See whiteweed.
• noun (Bot.) any plant of the genus Aster, of which there are many species.
• noun (Bot.) the whiteweed. See Daisy (b).

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A wild flowering plant Bellis perennis of the Asteraceae family, with a yellow head and white petals
• noun Many other flowering plants of various species.
• noun Cockney rhyming slang boots or other footwear. From daisy roots.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any of numerous composite plants having flower heads with well-developed ray flowers usually arranged in a single whorl