Definition of mushroom body in English:

mushroom body

noun

Entomology
  • Either of a pair of structures in the protocerebrum of the insect brain, each consisting of a cap of neuropil and a two- or three-lobed stalk, which are particularly well developed in social insects.

Origin

Late 19th century; earliest use found in Quarterly Journal of Microscopical Science. After German pilzhutförmiger Körper.