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ray flower

noun, Botany
1.
one of the marginal florets surrounding the disk of tubular florets in the flower heads of certain composite plants, as the daisy.
Also called ray floret.
Origin
1850-1855
1850-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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ray-floret in Science
ray flower  
One of the narrow flowers, resembling single petals, that surround the central disk in the capitulum or flower cluster of a plant of the composite family (Asteraceae or Compositae), such as the daisy or sunflower. Rays are often male flowers with sterile stamens. Also called ray, ray floret. See illustration at disk flower.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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