Relating to hadrons, which are subatomic particles made of quarks held together by the strong nuclear force.
From hadron (from Greek hadros 'thick' or 'strong') + -ic (adjective suffix). The term originated in particle physics in the mid-20th century to describe the strong force interaction.
Hadrons are the only particles you'll ever actually 'feel'—protons and neutrons in your body are hadrons, which is why the physics term literally refers to 'thick' or 'strong' particles.
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