(botany) A lump found on the roots of some plants, primarily legumes, that forms a symbiosis with nitrogen-fixing bacteria known as rhizobia, allowing the plant to obtain nitrogen directly from the atmosphere, which most plants cannot do.

plural of celery root

Synonym of celeriac.

(neuroanatomy) The one of the two roots of a spinal nerve that passes dorsally to the spinal cord and consists of sensory fibers

plural of dorsal root

plural of root of scarcity

(archaic) Synonym of mangelwurzel

plural of root nodule

Synonym of Jack-in-the-pulpit (“the plant Arisaema triphyllum”)

Alternative form of rootin' tootin'.