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Webster's New World College Dictionary » pollen tube
pollen tube
pollen tube definition
pollen tube
Bot. the tubelike growth that emerges from a germinating pollen grain and enters the embryo sac in an ovule: a male gamete passes through it to fertilize the female gamete
Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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