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Root hair

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root hair

–noun
an elongated tubular extension of an epidermal cell of a root, serving to absorb water and minerals from the soil.

Origin:
1855–60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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root hair  
n.  A thin hairlike outgrowth of an epidermal cell of a plant root that absorbs water and minerals from the soil.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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