1. relating to atoms or the structure of atoms
2. relating to nuclear energy or nuclear weapons
3. extremely small; tiny

Examples

• The atomic structure of carbon includes six protons.
• Scientists studied atomic particles in the laboratory.
• The atomic bomb changed warfare forever.
• Nuclear power plants use atomic energy to generate electricity.
• The details were broken down to atomic levels.
• Each atomic element has unique properties.
• The atomic weight of hydrogen is approximately one.
• Atomic research requires sophisticated equipment.