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A slender rootlike filament that grows from an alga, a fungus, or the gametophyte of a moss, liverwort, or fern, used for attachment and nourishment.

rhi′zoid′, rhi·zoi′dal (-zoid′l) adj.
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Adj.1.rhizoidal - of or relating to a rhizoid
References in periodicals archive ?
In addition, research should be done to assess the relationships of these peculiar rhizoidal morphologies with variations of the substrates.
ce= spore coat, cp= prothallial cell, cr= rhizoidal cell, gg= oil bodies, r= rhizoid.