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root hair

noun
1.
an elongated tubular extension of an epidermal cell of a root, serving to absorb water and minerals from the soil.
Origin of root hair
1855-1860
1855-60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for root-hair
Historical Examples
  • The outside of the root-hair is bathed in solutions rich in nourishment.

    Agriculture for Beginners Charles William Burkett
  • The nourishment passes from the outside to the inside through the delicate membrane of the root-hair.

    Agriculture for Beginners Charles William Burkett
  • The extent of the root-hair region will vary according to the vigour and development of the roots and the nature of the soil.

    A Handbook of Some South Indian Grasses Rai Bahadur K. Ranga Achariyar
British Dictionary definitions for root-hair

root hair

noun
1.
any of the hollow hairlike outgrowths of the outer cells of a root, just behind the tip, that absorb water and salts from the soil
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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root-hair in Science
root hair  
A hairlike outgrowth of a plant root that absorbs water and minerals from the soil. Root hairs are tubular extensions of the epidermis that greatly increase the surface area of the root. They are constantly dying off and being replaced by new ones as the root grows and extends itself into the soil.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Word Value for root

4
4
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