jonquil

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

• noun Any of several yellow-flowered daffodils, especially Narcissus jonquilla, having long narrow leaves and fragrant flowers with a short corona.

from The Century Dictionary.

• noun An ornamental plant, the Narcissus Jonquilla, of the natural order Amaryllidaceœ; the rush-leafed daffodil.
• noun A light-yellow color of the Sèvres porcelain; also, a similar color in other porcelains.
• noun A variety of the domesticated canary-bird.
• noun A light-yellow color much favored in the French mural decoration of the eighteenth century.

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

• noun (Bot.) A bulbous plant of the genus Narcissus (Narcissus Jonquilla), allied to the daffodil. It has long, rushlike leaves, and yellow or white fragrant flowers. The root has emetic properties. It is sometimes called the rush-leaved daffodil. See Illust. of corona.

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

• noun A fragrant bulb flower (Narcissus jonquilla).
• noun A species of daffodil.
• noun A shade of yellow.

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

• noun often used colloquially for any yellow daffodil
• noun widely cultivated ornamental plant native to southern Europe but naturalized elsewhere having fragrant yellow or white clustered flowers