核

1. noun stone (of a fruit); pit; pip
2. core (of an organization, team, etc.); nucleus; heart
3. noun, takes の nuclear weapons
4. noun, physics nucleus (of an atom)
5. biology nucleus (of a cell)
6. meteorology condensation nucleus
7. astronomy (planetary) core
8. chemistry ring (in a cyclic compound)
9. mathematics kernel; core
10. nucleus (of a cultured pearl)

さね also 実

1. noun seed (of a fruit); pit; pip; stone
2. architecture tongue (projecting strip on a board that fits into a groove on another board)
3. clitoris
4. archaic core; kernel; heart