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 grain or seed, as of a cereal grass, enclosed in a husk.
- The inner, usually edible seed of a nut or fruit stone.
- The most material and central part; the core: "that hard kernel of gaiety that never breaks” ( Evelyn Waugh).