prop root

noun Botany.
an adventitious root that supports the plant, as the aerial roots of the mangrove tree or of corn.
Also called brace root.


Origin:
1900–05

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Collins
World English Dictionary
prop root
 
n
a root that grows from and supports the stem above the ground in plants such as mangroves

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
prop root   (prŏp)  Pronunciation Key 
An adventitious root that arises from the stem, penetrates the soil, and helps support the stem, as in corn.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
As trees age, gaining size and putting down large prop root supports, significant horizontal as well as vertical growth occurs.
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