noun, plural mycorrhizae [mahy-kuh-rahy-zee] , mycorrhizas. Plant Pathology.
a symbiotic association of the mycelium of a fungus, especially a basidiomycete, with the roots of certain plants, in which the hyphae form a closely woven mass around the rootlets or penetrate the cells of the root.
Also, mycorhiza.
Also called fungus root.

1890–95; myco- + -rrhiza

mycorrhizal, mycorhizal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
mycorrhiza or mycorhiza (ˌmaɪkəˈraɪzə)
n , pl -zae, -zas
ectotrophic mycorrhiza See endotrophic mycorrhiza an association of a fungus and a plant in which the fungus lives within or on the outside of the plant's roots forming a symbiotic or parasitic relationship
[C19: from myco- + Greek rhiza root]
mycorhiza or mycorhiza (ˌmaɪkəˈraɪzə, -ziː)
[C19: from myco- + Greek rhiza root]
mycor'rhizal or mycorhiza
myco'rhizal or mycorhiza

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
mycorrhiza   (mī'kə-rī'zə)  Pronunciation Key 
The symbiotic association of the mycelium of a fungus with the roots of plants. The majority of vascular plants have mycorrhizae. The fungus assists in the absorption of minerals and water from the soil and defends the roots from other fungi and nematodes, while the plant provides carbohydrates to the fungus. There are two kinds of mycorrhizae: endomycorrhizae, in which the fungal hyphae enter the cells of the root cortex, and ectomycorrhizae, in which they surround the cells.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences for mycorrhizal
Such mycorrhizal communities are called common mycorrhizal networks.
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