A hypothetical particle consisting of two neutrons bound together without protons, studied in theoretical nuclear physics.
From Greek 'di-' (two) combined with 'neutron,' the subatomic particle discovered in 1932. The term emerged in mid-20th century nuclear physics research.
Dineutrons don't exist naturally and are incredibly unstable—physicists study them in particle accelerators to understand the fundamental rules of matter, making it one of science's most exotic and short-lived particles.
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