noun any of various soil-inhabiting
fungi of the genus
Rhizoctonia, some species of
which are destructive to cultivated plants, causing damping off of seedlings, foliage blight,
root and stem cankers, and rot of storage organs.
Origin: <
Neo-Latin (1815), equivalent to
Greek rhizo- rhizo- +
któn(
os) murder (akin to
kteínein to kill, slay) +
Neo-Latin -ia -ia; so called from its pathogenic activity