To dig or pull up by the roots; to deracinate.

(phytopathology) Any of several plant fungal diseases caused by having over-wet roots.

(anatomy) The hollow part of the root of a tooth, containing the nerve and blood vessels. / (dentistry) A surgical operation on a root canal, typically filling it with gutta-percha.

(botany) Any adventitious root that grows from a plant stem above ground.

A disease, caused by a nematode, that causes swelling of the roots of oats

plural of root beer

A species of vole, Microtus oeconomus.

plural of root vole

(idiomatic) An initiating cause of a chain of events which leads to an outcome or effect of interest.

(transitive) The action of identifying the cause of a chain of events which leads to an outcome or effect of interest. To root cause something's root cause does not necessarily imply the use of root cause analysis (RCA).