the world > plants > part of plant > reproductive part(s) > fruit or reproductive product > nut > [noun] > nutshell (7)
The rind, husk, or shell of fruit and grains.
The hard or woody pericarp enclosing the kernel of a nut. Cf. nutshale, n. 1a.
Botany. A hard, woody endocarp; spec. the stone of a drupe. Now rare.