nounpl. -·zae· or -·zas
an intimate symbiotic association of the mycelium of certain fungi with the root cells of some vascular plants, as certain orchids
Origin of mycorrhizafrom myco- + Classical Greek rhiza, root
nounpl. my·cor·rhi·zae, or my·cor·rhi·zas or my·co·rhi·zae or my·co·rhi·zas
The symbiotic association of the mycelium of a fungus with the roots of a plant, as is found in the majority of vascular plants.
Origin of mycorrhizamyco- Greek rhiza root ; see wrād- in Indo-European roots.