The essential part of a seed; all that is within the seed
walls; the edible substance contained in the shell of a nut; hence,
anything included in a shell, husk, or integument; as, the kernel of a
nut. See Illust. of Endocarp.

A small mass around which other matter is concreted; a
nucleus; a concretion or hard lump in the flesh.

The central, substantial or essential part of anything; the
gist; the core; as, the kernel of an argument.

To harden or ripen into kernels; to produce kernels.