n.
Pronunciation: ' ha- ˌ drän
Function: noun
Etymology: International Scientific Vocabulary hadr- thick, heavy (fr. Greek hadros thick) + 2 -on
Date: 1962
: any of the subatomic particles (as protons and neutrons) that are made up of quarks and are subject to the strong force
– ha · dron · ic \ ha- ' drä-nik \ adjective